STRAIGHTERLINE CHEMISTRY FINAL Exam Newest 2027 Complete Questions and Correct Detailed Answers (Verified Answers) |Already Graded A+

STRAIGHTERLINE CHEMISTRY FINAL Exam
Newest 2027 Complete Questions and Correct
Detailed Answers (Verified Answers) |Already
Graded A+
How does atomic radius change as you move across the periodic table?
Select one:
a. Atomic radius decreases moving from left to right across a period and increases
from top to bottom.
b. Atomic radius increases moving left to right across a period and decreases from
top to bottom.
c. Smaller nuclear charge lowers energy; more electrons in an orbital lowers
energy.
d. Atomic radius increases diagonally across the periodic table.
e. None of the ANSWERs is correct. - ANSWER -a. Atomic radius decreases
moving from left to right across a period and increases from top to bottom.

Which of these choices is the electron configuration of the iron(III) ion?
Select one:
a. [Ar]3d5
b. [Ar]4s13d5
c. [Ar]4s23d3
d. [Ar]3d6
e. [Ar]4s23d9 - ANSWER -a. [Ar]3d5

An element with the general electron configuration for its outermost electrons of
ns2np1 would be in which element group?
Select one:
a. 2A
b. 3A
c. 4A
d. 5A
e. 8A - ANSWER -b. 3A

, The effective nuclear charge for an atom is less than the actual nuclear charge due
to
Select one:
a. shielding.
b. penetration.
c. paramagnetism.
d. electron-pair repulsion.
e. relativity. - ANSWER -a. shielding.

Which pair of ions exhibits the greatest attractive force between them?
Select one:
a. Na+ and Cl-
b. Ca2+ and Cl-
c. Na+ and S2-
d. Al3+ and Mg2+
e. Mg2+ and O2- - ANSWER -e. Mg2+ and O2-

Which of the following is a basic oxide?

Select one:
a. P4O10
b. MgO
c. Al2O3
d. SO2
e. Cl2O7 - ANSWER -b. MgO

Which of these compounds is most likely to be covalent?
Select one:
a. Rb2S
b. SrCl2
c. CS2
d. CaO
e. MgI2 - ANSWER -c. CS2

, In the Lewis structure of the iodate ion, IO3-, that satisfies the octet rule, the
formal charge on the central iodine atom is

Select one:
a. 2.
b. 1.
c. 0.
d. -1.
e. -2. - ANSWER -a. 2.

Which molecule has the largest dipole moment?

Select one:
a. HF
b. HI
c. HBr
d. HCl
e. All of the molecules have the same dipole moment. - ANSWER -a. HF

In which of the following species does the central atom violate the octet rule?

Select one:
a. CH4
b. SF4
c. PCl4+
d. CCl3+
e. NH3 - ANSWER -b. SF4

Which of these ionic solids would have the largest lattice energy?
Select one:
a. NaCl
b. NaF
c. CaBr2
d. CsI
e. CaCl2 - ANSWER -e. CaCl2

, The total number of bonding electrons in a molecule of formaldehyde (H2CO) is

Select one:
a. 3.
b. 4.
c. 6.
d. 8.
e. 18. - ANSWER -d. 8.

Which of the following molecules has a nonzero dipole moment?
Select one:
a. BeCl2
b. SF2
c. KrF2
d. CO2
e. CCl4 - ANSWER -b. SF2

According to the VSEPR model, a molecule with the general formula AB5 with
one lone pair on the central atom will have a ______ molecular geometry.
Select one:
a. tetrahedral
b. trigonalbipyramidal
c. square pyramidal
d. octahedral
e. seesaw - ANSWER -c. square pyramidal

Which is the most reasonable prediction for the three F-Br-F bond angles in BrF3?
Select one:
a. 90°, 90°, and 180°
b. 86°, 94°, and 180°
c. 86°, 86°, and 172°
d. 94°, 94°, and 172°
e. 120°, 120°, and 120° - ANSWER -c. 86°, 86°, and 172°