STRAIGHTERLINE CHEMISTRY FINAL EXAM QUESTIONS WITH COMPLETE SOLUTIONS LATEST

STRAIGHTERLINE CHEMISTRY FINAL
EXAM QUESTIONS WITH COMPLETE
SOLUTIONS LATEST
The formula for sodium sulfide is
Select one:
a. NaS
b. K2S
c. NaS2
d. Na2S
e. SeS - Answer-d. Na2S

Which one of the following formulas of ionic compounds is the least likely to be correct?
Select one:
a. NH4Cl
b. Ba(OH)2
c. Na2SO4
d. Ca2NO3
e. Cu(CN)2 - Answer-d. Ca2NO3

What is the name of ClO - ion?
Select one:
a. hypochlorite
b. chlorate
c. chlorite
d. perchlorate
e. perchlorite - Answer-a. hypochlorite

Which of the following is a molecular formula for a compound with an empirical formula
of CH?
Select one:
a. C2H6
b. C3H9
c. C4H10
d. C6H6
e. None of the answers is correct. - Answer-d. C6H6

Which is the correct electron configuration for gold?

Select one:
a. [Xe]4f145d96s2
b. [Xe]4f145d106s2
c. [Xe]4f135d106s2

,d. [Xe]4f145d106s1
e. None of the electron configurations is correct. - Answer-d. [Xe]4f145d106s1

A(n) _________ is a point at which a standing wave has zero amplitude.
Select one:
a. crevice
b. node
c. pit
d. burrow
e. orbital - Answer-b. node

The Pauli exclusion principle states that no ____ electrons within an atom can have the
same ____ quantum numbers.
Select one:
a. 4; 6
b. 2; 4
c. 3; 6
d. 6; 10
e. 3; 8 - Answer-b. 2; 4

Emission spectra

Select one:
a. cannot be used to identify an unknown atom.
b. can be used to identify unknown atoms.
c. can be explained by the movement of protons colliding with electrons.
d. none of the. - Answer-b. can be used to identify unknown atoms.

Which one of the following equations correctly represents the process relating to the
ionization energy of X?
Select one:
a. X(s) → X+(g) + e-
b. X2(g) → X+(g) + X-(g)
c. X(g) + e- → X-(g)
d. X-(g) → X(g) + e-
e. X(g) → X+(g) + e- - Answer-e. X(g) → X+(g) + e-

Consider the element with the electron configuration [Kr]5s24d105p5. This element is
Select one:
a. a halogen.
b. a transition metal.
c. an alkali metal.
d. an actinide element.
e. a noble gas. - Answer-a. a halogen.

Consider the element with the electron configuration [Kr]5s24d7. This element is

,Select one:
a. a halogen.
b. a transition metal.
c. a nonmetal.
d. an actinide element.
e. a noble gas. - Answer-b. a transition metal.

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