chem chapter 8

Determine the number of bonding electrons and the number of nonbonding electrons in the structure of XeF2.

4,18

The halogens, alkali metals, and alkaline earth metals have ________ valence electrons, respectively.

7, 1, and 2

Determine the number of bonding electrons and the number of nonbonding electrons in the structure of CO2.

8,8

A nonpolar bond will form between two ________ atoms of ________ electronegativity.

identical, equal

Electronegativity ________ from left to right within a period and ________ from top to bottom within a group.

increases, decreases

What type of bonding occurs in sodium chloride, NaCl?

ionic

Elements from opposite sides of the periodic table tend to form ________.

ionic compounds

There are ________ unpaired electrons in the Lewis symbol for a sodium ion.

0

What is the maximum number of triple bonds that a carbon atom can form?

1

What is the maximum number of double bonds that a carbon atom can form?

2

A triple bond consists of ________ pairs of electrons shared between two atoms.

3

Which of the following would have to lose three electrons in order to achieve a noble gas electron configuration? Si Mg Al Cl P

Al

Of the molecules AlCl3 and AlBr3, which has bonds that are more polar?

AlCl3

What species has the electron configuration [Ar]3d4?

Cr2+

In the molecule FCl, which atom is the negative pole?

F

Of the atoms below, ________ is the most electronegative. F Br O Cl S

F

In which of the molecules below is the carbon-carbon distance the shortest? H-C≡C-H H2C=C=CH2 H3C-CH3 H3C-CH2-CH3 H2C=CH2

H-C≡C-H

The only noble gas without eight valence electrons is ________.

He

Which of the following would have to gain two electrons in order to achieve a noble gas electron configuration? O Sr Na Se Br

O, Se

All three of the boron-fluorine single bonds in BF3 are polar. In which direction should the polarity arrows point? to the right to the left toward the central boron atom away from the central boron atom

away from the central boron atom

What is the electron configuration for the Fe3+ ion?

[Ar]4s03d5

The electron configuration of the sulfide ion (S2-) is ________.

[Ne]3s23p6

Boron trifluoride (BF3 ) is used as a catalyst in many organic synthesis reactions. What type of bonding occurs between the atoms of a BF3 molecule?

covalent

What type of bonding occurs in a sample of pure copper, Cu? In other words, how is one copper atom held to another copper atom?

metallic