Deck 2: Atoms and Molecules

Question 1

The Group II metals (Be, Mg, Ca, Sr, and Ba) are commonly referred to as the:

A) alkali metals
B) alkaline earth metals
C) halogen metals
D) lanthanide metals

Answer 1

alkaline earth metals

Question 2

Which pair of elements can be classified as noble gases?

A) H and He
B) Na and K
C) Kr and Ar
D) N and O

Answer 2

Kr and Ar

Question 3

A horizontal row of elements on the periodic table is referred to as a family.

Answer 3

False

Question 4

Which of the following are examples of transition metals:

A) Fe and Zn
B) Sb and I
C) Pm and Gd
D) Al and Ga

Question 5

The nucleus is comprised of the atom's protons and electrons.

Question 6

The correct systematic name of AlCl₃ is aluminum chloride.

Question 7

The average mass of an atom is determined by

A) taking a weighted average of all isotopic masses
B) averaging the masses of each isotope
C) taking a weighted average of all stable isotopic masses
D) adding the isotopic masses and dividing by the number of isotopes

Question 8

Free radicals such as tend to be very reactive.

Question 9

Which of the following elements are actinides?

A) Ti and Cr
B) U and Np
C) Sm and Er
D) Kr and Xe

Question 10

The correct systematic name of V₂O₅ is divanadium pentoxide.

Question 11

All polymers form rigid solids at standard temperature and pressure.

Question 12

The most dense elements tend to be found in:

A) Period 2
B) Period 6
C) Period 5
D) Period 4

Question 13

Pentane has a five carbon atom skeleton

Question 14

CH₃ − O − CH₃ is an example of an alcohol

Question 15

Elements in a periodic family tend to react in similar fashion.

Question 16

The chemical symbol for nitrite is NO₃^{1 −} .

Question 17

For a given family (ie. the alkali metals), the element in which period is most reactive?

A) 2nd
B) 3rd
C) 4th
D) 5th

Question 18

Cations are particles with fewer electrons than protons.

Question 19

Gallium, arsenic, and silicon are used as metalloids in the semiconductor industry.

Question 20

Ions of opposite charges attract one another. This attraction is governed by:

A) Calbert's Law
B) Henry's Law
C) Franklin's Law
D) Coulomb's Law

Question 21

The molecular formula of calcium phosphate is:

A) Ca₃P₂
B) CaPO₃
C) Ca₃(PO₄)₂
D) Ca₂(PO₄)₃

Question 22

Consider ²³⁵U. How many neutrons are present in this nuclide?

A) 143
B) 235
C) 92
D) 177

Question 23

The correct molecular formula for iron(II)bromide is:

A) FeBr₃
B) FeBr₂
C) I₂Br₂
D) IBr₃

Question 24

How many electrons are present in a ⁴⁰Ca²⁺ species?

A) 40
B) 38
C) 20
D) 18

Question 25

The systematic (IUPAC) name of NaClO₄ is:

A) sodium perchlorate
B) sodium chlorate
C) sodium hypochlorate
D) sodium chloride tetraoxide

Question 26

The correct molecular formula of rubidium chloride is:

A) RuCl₂
B) RbCl₂
C) RuCl
D) RbCl

Question 27

Which species contains 9 protons?

A) (¹⁶O)
B) (¹⁹F)
C) (³⁵S)
D) (³²P)

Question 28

Consider the ²⁰³Hg. How many neutrons are present in this nuclide?

A) 203
B) 80
C) 283
D) 123

Question 29

Alkali metal cations carry a charge of:

A) 1+
B) 2+
C) 2 −
D) 1 −

Question 30

The correct molecular formula for ammonium chloride is:

A) NH₃Cl
B) AmCl
C) NH₄Cl
D) AmCl₂

Question 31

If an ion contains 33 protons, 39 neutrons, and 34 electrons, the ion is:

A) (⁷³Se^{1 −} )
B) (⁷²As^{1 −} )
C) (⁶⁷Y¹⁺)
D) (⁷³Se¹⁺)

Question 32

The correct molecular formula of dinitrogen pentoxide is:

A) N₂O₅
B) (NO₅)₂
C) 2NO₅
D) N₂P₅O

Question 33

The correct molecular formula of tin(IV)oxide is:

A) TiO₂
B) SnO₂
C) SnO₄
D) TiO₄

Question 34

Uranium, plutonium, and neptunium are classified as:

A) alkali metals
B) alkaline earth metals
C) lanthanides
D) actinides

Question 35

The systematic (IUPAC) name of MgI₂ is:

A) manganese iodide
B) manganese diiodide
C) magnesium iodide
D) magnesium (II) iodide

Question 36

CaCl₂ is an example of a(n):

A) covalent compound
B) formula unit
C) molecular compound
D) organic acid

Question 37

The systematic (IUPAC) name of CuO is:

A) copper (I) oxide
B) copper (II) oxide
C) copper oxide
D) copper (II) hydroxide

Question 38

The correct molecular formula for strontium chloride is:

A) SrCl₂
B) StCl₂
C) SrClO₂
D) SrCl

Question 39

The correct molecular formula for lead nitrate is:

A) PbN₃
B) Pb(NO₂)₃
C) Pb(NO₃)₂
D) PNO₃

Question 40

The systematic (IUPAC) name of Sr(NO₂)₂ is:

A) strontium nitrate
B) strontium dinitrate
C) sirium nitrate
D) strontium nitrite

Question 41

The ____________________ provides a ratio of atoms in a compound.

Question 42

____________________ are nuclei having the same number of protons but different numbers of neutrons.

Question 43

The atomic mass of an atom is the number of ____________________ in that particular atom.

Question 44

The ratio of isotopes for a given element can be measured instrumentally using a(n) ____________________.

Question 45

When electrons are shared between pairs of atoms rather than donated from one atom to another or mobile across an entire lattice, a(n) ____________________ bond is present.