Question 1

How many electrons will nitrogen gain or lose to obtain a noble gas configuration of electrons?

Accepted Answer

A) gain 4 
B) lose 5 
C) lose 7 
D) gain 3

Question 2

Write the formula for the salt that forms from the following pair of elements: sodium (Na)and oxygen (O).

Accepted Answer

A) NaO2 
B) NaO 
C) Na2O 
D) Na6O

Question 3

What is special about the number of electrons that each noble gas contains?

Accepted Answer

A) It is the maximum for a particular energy level. 
B) It is the minimum for a particular energy level 
C) Noble gases need to undergo chemical reactions to gain more electrons. 
D) None of the above.

Question 4

As you move from left to right across the periodic table, each element has one more ________ than the element before it.

Accepted Answer

A) family 
B) atom 
C) electron 
D) neutron 
E) energy level

Question 5

Which of the following elements will form a cation?

Accepted Answer

A) Ne 
B) Ca 
C) N 
D) O 
E) Cl

Question 6

The driving force that causes atoms to react with one another is the desire for an increase in

Accepted Answer

A) the number of electrons. 
B) stability. 
C) the size of the atom. 
D) metallic property of the atom.

Question 7

In a polar covalent bond,

Accepted Answer

A) electrons are shared between two of the same type of atom. 
B) there is an uneven distribution of electron density between two atoms. 
C) electrons are sometimes "split" so that part goes to one atom and another part goes to another atom. 
D) there are more protons than electrons between two atoms.

Question 8

How many dots would be placed around the Si symbol in its Lewis dot structure?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 6

Question 9

How many total electrons are shared between the atoms in a water molecule, H2O?

Accepted Answer

A) 2 
B) 4 
C) 14 
D) 12

Question 10

Which of the following elements will form an anion?

Accepted Answer

A) Na 
B) He 
C) Zn 
D) Pb 
E) Br

Question 11

An oxygen ion will have the same number of electrons as which of the following noble gases?

Accepted Answer

A) He 
B) Ne 
C) Ar 
D) Kr 
E) Xe

Question 12

How many core electrons and how many valence electrons do atoms of Sr possess?

Accepted Answer

A) 38 core and 87 valence 
B) 32 core and 8 valence 
C) 36 core and 2 valence 
D) 18 core and 20 valence

Question 13

How many electrons can the third energy level hold, maximum?

Accepted Answer

A) 2 
B) 8 
C) 10 
D) 18 
E) 32

Question 14

A control experiment is one

Accepted Answer

A) that is repeated at least three times. 
B) in which most of the variables are tightly controlled so that the effect of changing one variable can be determined. 
C) that is tightly sealed and not exposed to oxygen so that the effect of oxygen on the experimental variables can be determined. 
D) that produces an "xy" plot.

Question 15

Write the formula for the salt that forms from the following pair of elements: aluminum (Al)and bromine (Br).

Accepted Answer

A) Al3Br 
B) AlBr2 
C) AlBr 
D) AlBr3

Question 16

Write the formula for the salt that forms from the following pair of elements: calcium (Ca)and chlorine (Cl).

Accepted Answer

A) CaCl 
B) CaCl2 
C) Ca2Cl 
D) Ca2Cl2

Question 17

In a solid metal, the type of bonding that exists can be described

Accepted Answer

A) as a sea of free electrons moving between the atoms. 
B) as a transfer of electrons from one atom to another. 
C) as the sharing of electrons between adjacent atoms. 
D) as the localization of electrons around the more positive element.

Question 18

If an atom obeys the octet rule it means that

Accepted Answer

A) it has a total of 8 electrons. 
B) it has 8 valence electrons. 
C) it has 8 protons. 
D) it has 8 particles in the nucleus.

Question 19

How many electrons will calcium gain or lose to obtain a noble gas configuration of electrons?

Accepted Answer

A) gain 16 
B) lose 12 
C) lose 2 
D) gain 4

Question 20

Which one of the following elements does not exist naturally as a diatomic molecule?

Accepted Answer

A) N 
B) O 
C) F 
D) H 
E) C

Exam 4: Bonds an Introduction to the Forces Within Substances