STRAIGHTERLINE CHEMISTRY LATEST FINAL EXAM QUESTIONS AND ANSWERS SURE A.pdf

STRAIGHTERLINE CHEMISTRY LATEST FINAL
EXAM QUESTIONS AND ANSWERS SURE A+
✔✔How many neutrons are there in an atom of lead whose mass number is 208?

Select one:
a. 82
b. 126
c. 208
d. 290
e. none of them - ✔✔b. 126

✔✔Which of these elements is chemically similar to magnesium?

Select one:
a. Sulfur
b. Calcium
c. Iron
d. Nickel
e. Potassium - ✔✔b. Calcium

✔✔C(graphite) and C(diamond) are examples of:

,Select one:
a. isotopes of carbon.
b. allotropes of carbon.
c. the law of definite proportions.
d. different carbon ions. - ✔✔b. allotropes of carbon.

✔✔The 80Br- ion has

Select one:
a. 45 protons, 35 neutrons, 45 electrons.
b. 35 protons, 45 neutrons, 34 electrons.
c. 35 protons, 45 neutrons, 36 electrons.
d. 45 protons, 35 neutrons, 46 electrons.
e. 35 protons, 45 neutrons, 46 electrons. - ✔✔e. 35 protons, 45 neutrons, 46 electrons.

✔✔The formula for sodium sulfide is
Select one:
a. NaS
b. K2S
c. NaS2
d. Na2S
e. SeS - ✔✔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 - ✔✔d. Ca2NO3

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