Deck 2: Atoms, Molecules, and Ions

Question 1

Which subatomic particles listed below are considered charged?
I. neutron
II. proton
III. electron

A) I only
B) I and II
C) I and III
D) II and III
E) All of these

Answer 1

II and III

Question 2

An atom is best defined as a:

A) pure substance composed of two or more elements.
B) pure substance that can be decomposed by chemical means.
C) homogeneous uniform mixture.
D) smallest unit of an element that enters into a chemical combination.
E) chemical combination of two or more elements.

Answer 2

smallest unit of an element that enters into a chemical combination.

Question 3

The mass of an atom is mainly contained in which of the below particles?

A) protons
B) protons and neutrons
C) protons and electrons
D) neutrons and electrons
E) neutrons

Answer 3

protons and neutrons

Question 4

Which of the following subatomic particles has a negative charge associated with it?
I. a proton
II. an electron
III. a neutron

A) I only
B) II only
C) III only
D) I and II
E) All of these

Question 5

J) J. Thomson used the deflection of electrons by magnetic and electric fields to measure

A) the volume of the electron.
B) the mass of the electron.
C) the charge of the electron.
D) the mass to charge ratio of the electron.
E) none of these.

Question 6

What was the result of the Rutherford experiment of directing a beam of alpha particles at a thin gold foil?

A) X-rays were discovered.
B) The neutron was discovered.
C) The nucleus in atoms was discovered.
D) The charge of a proton was measured.
E) None of these.

Question 7

The mass number of the only stable isotope of F is:

A) 19
B) 18
C) 10
D) 9
E) none of these

Question 8

The atomic number of P is:

A) 14
B) 15
C) 30
D) 31
E) none of these

Question 9

By observing the scattering of alpha particles from gold foil, Rutherford determined that atoms have:

A) positive charges distributed approximately evenly throughout the atom.
B) a dense positively charged core.
C) different isotopes having different masses.
D) wave-like particles of very small dimensions.
E) none of these.

Question 10

The atomic number of F is:

A) 19
B) 18
C) 10
D) 9
E) none of these

Question 11

Which statements below are part of Dalton's Atomic Theory?
I. Matter is composed of small indivisible particles called atoms.
II. An element is composed entirely of one type of atom.
III. Atoms of two or more elements can combine to form compounds.

A) I and II but not III
B) I and III but not II
C) II and III but not I
D) All three are part of Dalton's Theory.
E) None are part of Dalton's Theory.

Question 12

The mass number of the only stable isotope of P is:

A) 15
B) 16
C) 30
D) 31
E) none of these

Question 13

Which of the subatomic particles listed below contribute(s) most significantly to the overall mass of a single atom?

A) a proton
B) an electron
C) a neutron
D) a proton and a neutron
E) a proton and an electron

Question 14

Which type of radioactivity is a high energy electron?

A) Beta ray
B) Alpha particle
C) Gamma ray
D) x-ray
E) none of these

Question 15

Isotopes are atoms of the same element that have the same number of ____, but different number of ____.

A) protons, electrons
B) neutrons, protons
C) protons, neutrons
D) electrons, protons
E) neutrons, electron

Question 16

The nucleus of an atom contains what subatomic particle(s)?

A) neutrons
B) protons
C) electrons
D) neutrons and protons
E) neutrons, protons and electrons

Question 17

Which particle listed below fits the description of a completely ionized helium atom?

A) Beta ray
B) Alpha particle
C) Gamma ray
D) x-ray
E) none of these

Question 18

An atom is electrically neutral because

A) it contains equal numbers of protons and electrons.
B) it contains equal numbers of neutrons and electrons.
C) no charged particles are present in atoms.
D) the mass number and atomic number are equal.
E) none of these.

Question 19

The Millikan oil drop experiment measured:

A) the charge of a proton.
B) the charge of an electron.
C) the ratio of charge to mass for a proton.
D) the mass of the neutron.
E) none of these.

Question 20

The main difference between a proton and a neutron is:

A) a proton has considerably more mass than a neutron.
B) a proton is charged, a neutron is not.
C) a neutron is much larger than a proton.
D) a neutron is located in the nucleus of an atom, a proton is not.
E) a proton is much larger than a neutron.

Question 21

The symbol for the species that contains 22 protons, 26 neutrons, and 18 electrons is:

A) "⁴⁸Ti^{4 -} "
B) "²²Ti⁴⁺"
C) "²⁶Ti^{2 -} "
D) "⁴⁸Ti⁴⁺"
E) "none of these"

Question 22

Which species listed below has 15 protons, 18 electrons, and 16 neutrons?

A) "³¹P"
B) "¹⁸Ar"
C) "¹⁶S^{2 -} "
D) "³¹P^{3 -} "
E) "³¹Ga³⁺"

Question 23

A species that contains 16 protons, 17 neutrons, and 16 electrons would be represented by the symbol:

A) "³³₁₇Cl⁺"
B) "³³₁₆S⁺"
C) "³²₁₆S"
D) "³³₁₆S ^- "
E) "³³₁₆S"

Question 24

The species containing 6 protons and 5 electrons (and some number of neutrons) would be written as:

A) C
B) C ^-
C) B⁺
D) C⁺
E) none of these

Question 25

What isotope has 45 neutrons and 35 protons?

A) Bromine - 35
B) Bromine - 45
C) Bromine - 80
D) Rhodium - 45
E) Rhodium - 80

Question 26

How does a neutral atom become a charged ion?
I. By adjusting its number of electrons.
II. By adjusting its number of protons.
III. By adjusting its number of neutrons.

A) I only
B) II only
C) III only
D) I and II
E) All of these

Question 27

The species ³⁵Cl ^- has:

A) 35 protons, 35 neutrons, and 35 electrons.
B) 18 protons, 17 neutrons, and 17 electrons.
C) 17 protons, 18 neutrons, and 17 electrons.
D) 18 protons, 17 neutrons, and 19 electrons.
E) 17 protons, 18 neutrons, and 18 electrons.

Question 28

The symbol for the species that contains 28 protons, 30 neutrons, and 26 electrons is:

A) "⁵⁸Ni^{2 -} "
B) "³⁰Ni²⁺"
C) "⁵⁶Ni^{2 -} "
D) "⁵⁸Ni²⁺"
E) "none of these"

Question 29

The isotope ³¹P^{3 -} has how many protons, neutrons and electrons?

A) 31 protons, 15 neutrons and 34 electrons
B) 15 protons, 16 neutrons and 18 electrons
C) 15 protons, 31 neutrons and 12 electrons
D) 15 protons, 31 neutrons and 15 electrons
E) 16 protons, 15 neutrons, and 19 electrons

Question 30

The species written as S^{2 -} has:

A) 16 protons and 18 electrons.
B) 18 protons and 16 electrons.
C) 16 protons and 14 electrons.
D) 18 protons and 20 electrons.
E) none of these.

Question 31

A Sulfur - 34 isotope has how many protons and how many neutrons?

A) 16 protons and 34 neutrons
B) 16 protons and 18 neutrons
C) 34 protons and 16 neutrons
D) 34 protons and 18 neutrons
E) 18 protons and 16 neutrons

Question 32

How many protons and neutrons are in the Platinum - 195 isotope, ¹⁹⁵Pt?

A) 195 protons, 78 neutrons
B) 78 protons, 195 neutrons
C) 117 protons, 78 neutrons
D) 78 protons, 117 neutrons
E) 117 protons, 195 neutrons

Question 33

Which symbol listed below describes a particle with 15 protons, 16 neutrons, and 16 electrons?

A)
B)
C)
D)
E) none of these

Question 34

A particle that contains 8 protons, 9 neutrons, and 7 electrons could be written as:

A) "¹⁶₈O"
B) "¹⁷₉O⁺"
C) "¹⁷₈O"
D) "¹⁷₈O ^- "
E) "¹⁷₈O⁺"

Question 35

A Silicon - 29 isotope has how many protons and how many neutrons?

A) 16 protons and 13 neutrons
B) 16 protons and 29 neutrons
C) 29 protons and 29 neutrons
D) 14 protons and 29 neutrons
E) 14 protons and 15 neutrons

Question 36

A species containing 16 protons, 17 neutrons, and 15 electrons would be designated as:

A)
B)
C)
D)
E) none of these

Question 37

The symbol stands for an isotope of potassium containing:

A) 19 electrons, 19 neutrons, 20 protons.
B) 18 electrons, 19 neutrons, 20 protons.
C) 19 electrons, 20 neutrons, 19 protons.
D) 18 electrons, 19 neutrons, 19 protons.
E) 18 electrons, 21 neutrons, 19 protons.

Question 38

The species ²⁸Si^{2 -} has:

A) 14 protons, 14 neutrons, and 16 electrons.
B) 14 protons, 14 neutrons, and 14 electrons.
C) 14 protons, 14 neutrons, and 12 electrons.
D) 28 protons, 28 neutrons, and 26 electrons.
E) none of these.

Question 39

How many protons , neutrons and electrons are in the iodide anion, ¹²⁷I ^{- 1}?

A) 53 protons, 74 neutrons, and 53 electrons
B) 52 protons, 74 neutrons, and 53 electrons
C) 53 protons, 74 neutrons, and 54 electrons
D) 53 protons, 127 neutrons, and 54 electrons
E) 52 protons, 75 neutrons, and 51 electrons

Question 40

The symbol represents a particle that contains:

A) 11 protons, 22 neutrons, 11 electrons.
B) 11 protons, 23 neutrons, 10 electrons.
C) 11 protons, 12 neutrons, 11 electrons.
D) 12 protons, 11 neutrons, 10 electrons.
E) 11 protons, 12 neutrons, 10 electrons.

Question 41

A new element is prepared that has two isotopes. One isotope is 32.00% abundant and has a mass of 103.2 u. The other has a mass of 105.2 u. What is the atomic mass of this element?

A) 103.8
B) 104.6
C) 104.2
D) 104.9
E) none of these

Question 42

Which of the following elements is non-metallic ?

A) K
B) Fe
C) Na
D) Ce
E) none of these

Question 43

Which of the elements from the list below is considered a nonmetallic element?

A) Barium
B) Iodine
C) Calcium
D) Chromium
E) Platinum

Question 44

What is the chemical symbol for the element, Iron ?

A) I
B) Ir
C) Fe
D) In
E) None of these

Question 45

Gold is a metal. Which property listed below is not consistent with Gold being a metal?

A) Gold is a thermal conductor.
B) Gold is an electrical insulator.
C) Gold is a bright, shiny lustrous solid.
D) Gold is a malleable and pliable solid.
E) None of these are consistent with Gold being a metal.

Question 46

A specially prepared sample of nitrogen contains 30% ¹⁴N (mass = 14.00 u) and 70% ¹⁵N (mass = 15.00 u). What is the atomic mass of the nitrogen in this sample?

A) 14.00
B) 14.30
C) 14.50
D) 14.70
E) 15.00

Question 47

Which describes a set of elements on the periodic table?

A) Hominide
B) Period
C) Moeity
D) Thoride
E) Transplatonic

Question 48

Cations are formed when neutral atoms:

A) Gain protons
B) Lose protons
C) Gain electrons
D) Lose electrons
E) Adjusting the number of neutrons.

Question 49

Which of the following matched pairs of elemental names and chemical symbols is not properly labeled?
I. Silicon, S
II. Nitrogen, N
III. Tungsten, T
IV. Gold, Au
V. Mercury, Me

A) I and V
B) I, II and III
C) III, IV and V
D) I, III and V
E) II and IV

Question 50

If the isotope had been assigned a mass of 6.0 u instead of 12 u, the weight of sulfur would be:

A) 32 u
B) 16 u
C) 8.0 u
D) 64 u
E) none of these

Question 51

Which of the following elements is considered a non-metal ?
I. Carbon
II. Potassium
III. Magnesium

A) I only
B) I and II
C) I and III
D) II and III
E) None of these

Question 52

What is the chemical symbol for the element, potassium ?

A) K
B) P
C) Pt
D) W
E) Po

Question 53

Which of the following elements is considered a metal ?

A) Sulfur
B) Chlorine
C) Phosphorous
D) Magnesium
E) Nitrogen

Question 54

What isotope is given by the following model for an atom?

A) "⁶²₄₇Sm"
B) "¹⁰⁹₄₇Ag"
C) "¹⁰⁹₆₂Sm"
D) "⁶²₄₇Ag"
E) "¹⁰⁹₄₇Mt"

Question 55

Which of the following elements is a metal ?

A) Br
B) C
C) Se
D) Si
E) none of these

Question 56

What is the chemical symbol for the element, Silicon ?

A) S
B) Si
C) Sn
D) Sc
E) None of these

Question 57

Which of the following is considered a general property of nonmetals ?

A) They are malleable solids.
B) They are thermal conductors.
C) They are electrical conductors.
D) Those that are solids are typically dull colored substances that lack luster and are brittle.
E) They can be drawn into wires.

Question 58

A new element is found that has an isotope that occurs naturally in 75% abundance and has a mass oF₄8.0 u and another isotope that occurs naturally in 25% abundance with a mass of 50.0 u. What is the atomic mass of the element?

A) 48.0 u
B) 48.5 u
C) 49.0 u
D) not enough data available to work this problem
E) none of these is correct

Question 59

Which of the elements from the list below is considered a metallic element ?

A) Zinc
B) Sulfur
C) Carbon
D) Silicon
E) Iodine

Question 60

Which of the following elements is considered a non-metal ?
I. Calcium
II. Phosphorous
III. Iodine

A) I and II
B) I and III
C) II and III
D) All of these
E) None of these

Question 61

Uranium is a member of what region on the periodic table?

A) Noble gas
B) Lanthanide
C) Actinide
D) Transition metal
E) Representative element

Question 62

Which set of elements would be expected to have nearly identical chemical properties?

A) C, N, O
B) N, P, As
C) Fe, Co, Ni
D) Ca, Na, Fe
E) Th, U, Am

Question 63

Which of the following elements is a 2nd period, Alkaline Earth Metal?

A) Calcium
B) Beryllium
C) Strontium
D) Carbon
E) Boron

Question 64

What is the molecular mass (to three significant figures) of C₁₂H₁₀O?

A) 170 u
B) 150 u
C) 190 u
D) 210 u
E) none of these

Question 65

What is the special name for the group on the periodic table that includes the elements Oxygen, Sulfur, Selenium, Tellurium, and Polonium?

A) Alkali Metals
B) Alkaline Earth Metals
C) Chalcogens
D) Halogens
E) Noble Gases

Question 66

Which element listed below is not classified as a lanthanide or actinide?

A) Ce
B) Sm
C) U
D) Fr
E) all are lanthanides or actinides

Question 67

The notation 4 SO₂ is used to represent:

A) 4 molecules, each containing 1 sulfur and 2 oxygen atoms.
B) 4 sulfur atoms and 4 O₂ molecules.
C) 4 sulfur atoms and 8 oxygen atoms.
D) a molecule containing 4 S atoms and 8 O atoms.
E) none of these.

Question 68

What is the molecular mass (to two significant figures) of C₆H₁₂O?

A) 84 u
B) 62 u
C) 110 u
D) 100 u
E) none of these

Question 69

What is the special name for the group on the periodic table that includes the elements Fluorine, Chlorine, Bromine, Iodine, and Astatine?

A) Alkali Metals
B) Alkaline Earth Metals
C) Chalcogens
D) Halogens
E) Noble Gases

Question 70

Which of the following elements is a 4th period, Alkaline Earth Metal?

A) Calcium
B) Beryllium
C) Strontium
D) Carbon
E) Boron

Question 71

Which of the following sets of elements would be expected to have very similar chemical properties for all elements?
Br, Cl, Co, Cu, F, Fe, Ni, S, Zn

A) F, Cl, S, Br
B) F, Cl, Br
C) Fe, Co, Ni, Cu, Zn
D) Fe, Ni, Zn
E) Co, Cu, Zn

Question 72

Which of the formula(s) from the following list is(are) that of a diatomic molecular compound ?
I. NO₂
II. N₂
III. NO

A) I only
B) both I and III
C) both II and III
D) III only
E) none of these

Question 73

Which of the following groups of elements are considered representative elements or Main Group Elements?

A) Alkali metals
B) Alkaline Earth metals
C) Halogens
D) Noble Gas
E) All of these

Question 74

Which element listed below is a member of the alkali metal family?

A) Br
B) Ca
C) K
D) S
E) none of these

Question 75

From the list of the following elements, which one would most likely have nearly identical properties as sodium metal?

A) Mg
B) K
C) Ne
D) Cl
E) All of these

Question 76

Which of the following is the fifth period, halogen?

A) B
B) I
C) At
D) Xe
E) Rb

Question 77

Which of the following matched pair of elements would be expected to have the most similar chemical properties?

A) Calcium and Potassium
B) Flourine and Bromine
C) Oxygen and Nitrogen
D) Boron and Beryllium
E) Gold and Iron

Question 78

Copper is a metal . Which property listed below is not consistent with copper being a metal?

A) Copper conducts heat.
B) Copper conducts electricity.
C) Copper is a red shiny colored substance.
D) Copper is a brittle powdery solid.
E) Copper can be drawn into a wire.

Question 79

What is the special name for the group on the periodic table that includes the elements Beryllium, Magnesium, Calcium, Strontium, and Barium?

A) Alkali Metals
B) Alkaline Earth Metals
C) Chalcogens
D) Halogens
E) Noble Gases

Question 80

Each molecule of ethene contain S₂atoms of carbon and 4 atoms of hydrogen. Its molecular formula is

A) 2 C⁺H₂
B) 2 CH₂
C) C₂H₄
D) Ca₂H₄
E) none of these