Deck 3: Atoms, Molecules, and Ions

Question 1

According to chemical nomenclature, SO₂ is referred to as sulfur dioxide.

Answer 1

True

Question 2

I⁻ is an example of a monatomic anion.

Answer 2

True

Question 3

Atoms of the same element with different numbers of electrons are called isotopes.

Answer 3

False

Question 4

'Au' is the atomic symbol of the element silver.

Question 5

The proton is a heavier subatomic particle than the electron and has a positive charge.

Question 6

The molecule Se₂Br₂ is called diselenide dibromide.

Question 7

Monatomic ions are formed when an atom loses or gains one or more electrons to attain a charge.

Question 8

The connection between two atoms in a molecule is called a chemical bond.

Question 9

According to the nomenclature of ionic compounds, MgCl₂ is called magnesium dichloride.

Question 10

Hydrogen and oxygen exist naturally as three-atom molecules.

Question 11

N³⁻ is called trinitride ion.

Question 12

The atomic mass unit is defined as one-twelfth of the mass of a nitrogen-14 atom.

Question 13

The molecular mass of dinitrogen trioxide is determined by adding the atomic mass of nitrogen two times with the atomic mass of oxygen three times.

Question 14

Species with overall negative charges are termed anions.

Question 15

Uranium-235 isotope of uranium has 143 neutrons.

Question 16

In the ionic compound NaCl, sodium ion is the cation and chloride ion is the anion.

Question 17

A proper covalent formula has a cation and an anion in it.

Question 18

The atomic mass of an element is a weighted average of the masses of the isobars of an atom.

Question 19

The number of protons and electrons in an element's nucleus is called the atomic number of the element.

Question 20

The smallest piece of an element that maintains the identity of that element is called a molecule.

Question 21

If a compound is composed of hydrogen ions and a polyatomic anion, then the name of the acid is derived from the stem of the polyatomic ion's name.

Question 22

Hg is the atomic symbol of the element _____.

A) nickel
B) helium
C) gallium
D) mercury
E) germanium

Question 23

Which of the following statements is consistent with the modern atomic theory?

A) Atoms of different elements can have the same configuration.
B) Atoms combine in whole number ratios to form compounds.
C) All matter is composed of isotopes.
D) Atoms of the same element are not the same always.
E) An electron is smallest piece of an element that maintains its identity.

Question 24

The _____ is a relatively massive subatomic particle with a positive charge.

A) isotope
B) proton
C) neutron
D) nucleus
E) electron

Question 25

The smallest piece of an element that maintains the identity of that element is called a(n) _____.

A) compound
B) molecule
C) atom
D) ingredient
E) particle

Question 26

Identify the subatomic particle with about the same mass as a proton but no charge.

A) Neutron
B) Nucleus
C) Electron
D) Isotope
E) Isobar

Question 27

Which of the following is an atom that is not a diatomic molecule?

A) Helium
B) Hydrogen
C) Chlorine
D) Fluorine
E) Oxygen

Question 28

Which of the following is a tiny subatomic particle with a negative charge?

A) Electron
B) Proton
C) Neutron
D) Photon
E) Isotope

Question 29

Atoms that contain more than one unit charge are called polyatomic ions.

Question 30

An acid is an ionic compound of the H⁺ cation dissolved in water.

Question 31

What is the approximate mass of a neutron, in kg?

A) 6.6 × 10⁻²⁷
B) 9.1× 10⁻²⁸
C) 1.6 × 10⁻²⁷
D) 9.1 × 10⁻³¹
E) 1.6 × 10⁻³¹

Question 32

Two atoms that have the same number of protons with different numbers of neutrons are called _____.

A) nuclear isomers
B) isotopes
C) isotones
D) isobars
E) chemical isobars

Question 33

HCl is the formula for chloric acid.

Question 34

The number of protons in the nucleus of an atom is 80, while the number of neutrons in the nucleus is 90. What is the mass number of this isotope?

A) 10
B) 170
C) 80
D) 90
E) 135

Question 35

Which of the following combinations refer to an isotope?

A) and
B) and
C) and
D) and
E) and

Question 36

The sum of the number of protons and neutrons in a nucleus is referred to as the _____ number.

A) potential
B) elemental
C) atomic
D) magnetic
E) mass

Question 37

Fe₂S₃ is called iron(II) sulfide.

Question 38

Which of the following is the atomic symbol of gold?

A) Gl
B) Gd
C) An
D) Ga
E) Au

Question 39

The nucleus is made up of what two subatomic particles?

A) Proton and electron
B) Proton and neutron
C) Neutron and electron
D) Photon and electron
E) Photon and neutron

Question 40

The atomic number of an atom refers to the _____.

A) number of protons in the atom
B) the atomic mass of the nucleus
C) the total mass of the electrons
D) number of neutrons in the atom
E) the atomic mass of the atom

Question 41

Hydrogen exists as molecules with _____ atom(s).

A) seven
B) two
C) four
D) one
E) five

Question 42

Which of the following is name given to SO₂ according to chemical nomenclature?

A) Sulfur oxide
B) Oxo-sulfur
C) Sulfur dioxide
D) Sulfo-oxide
E) Dioxy sulfide

Question 43

Which of the following represents the sodium ion?

A) Na²⁺
B) Na⁺
C) NaO^-
D) Na⁺OH^-
E) Na^2-

Question 44

The mass of an electron is _____ atomic mass units.

A) 1.00728
B) 0.000549
C) 0.5490
D) 1.879
E) 1.866

Question 45

A chemical bond is a connection between _____.

A) two molecules of a compound
B) electrons and the nucleus of an atom
C) two atoms in a molecule
D) neutrons and protons in the nucleus
E) two or more subatomic particles

Question 46

Electrons move from one atom to another to form species with overall electric charges. Such species are called _____.

A) beams
B) antiparticles
C) ions
D) quarks
E) composite particles

Question 47

How many neutrons can be found in the atom ?

A) 43
B) 161
C) 118
D) 75
E) 32

Question 48

The molecular mass is the sum of _____ in a molecule.

A) redundant neutrons
B) masses of subatomic particles
C) masses of protons
D) the masses of the atoms
E) electronic masses of atoms

Question 49

Which of the following is an example of an anion formed by the gain of two electrons?

A) Br⁻
B) Cu²⁺
C) Na⁺
D) Se²⁻
E) Rb⁺ I^-

Question 50

The _____ of an element is a weighted average of the masses of the isotopes that compose an element.

A) atomic number
B) mass number
C) isotopic mass
D) atomic mass
E) nuclear mass

Question 51

Uranium exists as about 98% U-238 and about 2% U-235. What is the atomic mass of uranium?

A) 238.06
B) 237.94
C) 237.14
D) 238.86
E) 239.55

Question 52

Substances that exist as two or more atoms connected together so strongly that they behave as a single particle are called _____.

A) compounds
B) polyatoms
C) diatomic compounds
D) subatomic compounds
E) molecules

Question 53

Which of the following constitute a proper molecule?

A) Cl
B) H₂O
C) N
D) P⁺
E) O^-

Question 54

What is the molecular formula of elemental hydrogen?

A) H₂
B) H₄
C) H₅
D) H₆
E) H₈

Question 55

Species with overall positive charges are termed _____.

A) quarks
B) beams
C) cations
D) anions
E) antiparticles

Question 56

Which of the following terms represents the species O^2-?

A) oxide anion
B) oxide cation
C) oxygen anion
D) oxygen cation
E) oxo-cation

Question 57

What is the atomic mass of dinitrogen trioxide (atomic mass of oxygen=15.999 u; atomic mass of nitrogen = 14.007 u)?

A) 76.011 u
B) 30. 010u
C) 74.019u
D) 160.012u
E) 60.019u

Question 58

Which of the following is not true in regards to sulfur hexafluoride (SF₆)?

A) It has similar physical properties in the vapor phase as sarin
B) It is very to detect
C) It is not a normal part of the atmosphere
D) Used as an aerial tracer for ventilation systems
E) It is toxic and highly reactive

Question 59

The Cl⁻ ion is formed when a chlorine atom _____.

A) loses one electron
B) gains one electron
C) loses one proton
D) gains one proton
E) gains one proton and loses one electron

Question 60

Which of the following represents diphosphorus hexafluoride?

A) (PF₃)₆
B) P₂F₄
C) P₂FO₆
D) P₂F₆
E) P₂O₂F₆

Question 61

Which of the following species is called sodium nitrate?

A) NaNO₂
B) Na₅N
C) Na₃NOH
D) Na₂NO
E) NaNO₃

Question 62

Which of the following statements is true for all acids?

A) Acids do not react with metals.
B) Acids do not contain nitrogen.
C) Acids have a sour taste.
D) Acids do not contain oxygen.
E) Acids do not contain water.

Question 63

The smallest part of a substance that has the physical and chemical properties of that substance is called a(n) _____.

Question 64

The _____ is a subatomic particle with about the same mass as a proton but no charge.

Question 65

The connection between two atoms in a molecule is known as a(n) _____.

Question 66

_____ is a specific system for naming compounds, in which unique substances get unique names.

Question 67

Write the proper ionic formula for the ionic compound obtained from the ions Al³⁺ and F⁻.

A) Al₃F₃
B) (AlF)₃
C) AlF
D) Al₃F
E) AlF₃

Question 68

Polyatomic ions are a group of ions that _____.

A) have same mass number and different atomic numbers
B) contain more than one atom
C) contain more than one positive or negative charge
D) have same atomic number and different mass numbers
E) contain more than one electron

Question 69

The magnitude of the charge is listed as a right _____ next to the symbol of the element.

Question 70

Which of the following represents acetic acid?

A) HC₂H₃O₂
B) H₂C₂O₄
C) HClO₄
D) H₃PO₄
E) H₂SO₃

Question 71

An acid is an ionic compound of the _____ dissolved in water.

A) K⁺ cation
B) H⁺ cation
C) O^- anion
D) Na⁺ cation
E) OH^- anion

Question 72

Common table salt (sodium chloride), used on foods, is the ionic compound _____.

A) NaCl₂
B) SoCl₂
C) SoCl
D) NaCl
E) Na₂Cl₂

Question 73

The _____ is the sum of the masses of the atoms in a molecule.

Question 74

Which of the following polyatomic ions is an oxyanion?

A) Triiodide
B) Cyanide
C) Ammonium
D) Carbonate
E) Calcium ion

Question 75

Which of the following polyatomic ions is a cation?

A) Bicarbonate
B) Carbonate
C) Chlorate
D) Peroxide
E) Ammonium

Question 76

The _____ of an element is a weighted average of the masses of the isotopes that compose an element.

Question 77

Ionic compounds form between:

A) metals and metals.
B) nonmetals and nonmetals
C) semiconductors and carbon alloys
D) metals and nonmetals.
E) semiconductors and nonmetals

Question 78

_____ is the proper name for the ionic compound formed between the ions K⁺ and S²⁻.

Question 79

Atoms of the same element with different numbers of neutrons are called _____.

Question 80

A species with an overall positive charge is called a(n) _____.