Chemistry- Chem 101 Practice Problems (Exam #2)

Br (is the more electronegative atom)

Which atom in the C-Br bond has a partial negative charge?

Li-F

Which of the following bonds has the most ionic character? A. B-F B. Li-F C. H-F D. Be-F

Al(SCN)3

Write the chemical formula for aluminum thiocyanate.

n=3, l=1, ml=0, ms= 1/2

A ground state atom of Mg could not have any electrons with which of the following configurations? A. n=3, l=1, ml=0, ms= 1/2 B. n=2, l=1, ml=0, ms= 1/2 C. n=3, l=0, ml=0, ms= 1/2 D. n=2, l=0, ml=0, ms= 1/2 E. n=1, l=0, ml=0, ms= 1/2

3

An electron has the following set of quantum numbers: 3, 2, -1, -1/2. What is the energy level for this electron?

d-orbital

An electron has the following set of quantum numbers: 3, 2, -1, -1/2. What type of orbital is represented by these quantum numbers?

Kr

An electron has the following set of quantum numbers: 3, 2, -1, -1/2. Which of the following atoms could have an electron in the ground state with these quantum numbers? A. Ne B. Ar C. Ca D. Kr

Polar

Is C2H2F2 polar or non polar?

Polar

Is H2CO polar or non polar?

due to the effective nuclear charge increasing.

The trend towards smaller atomic radii as one moves to the right in a period is

aluminum nitride

What is the IUPAC name for AlN?

copper (II) oxide

What is the IUPAC name for CuO?

hydrocyanic acid

What is the correct IUPAC name for HCN(aq)?

H-Cl

Which of the following is an example of a covalent bond? A. K-Cl B. Al-Cl C. H-Cl D. Al-Al

B2-

Which of the following molecules has a bond order of 1.5 according to molecular orbital theory? A. B2- B. N2- C. CN- D. NO-

N2O4

Write the chemical formula for dinitrogen tetroxide.

KrCl2

Write the chemical formula for krypton dichloride.

N3-

Write the chemical formula for the azide ion.