Chemistry Straighterline Final Exam | Questions Answered 100% Correct/Verified Solutions

Chemistry Straighterline Final Exam |
Questions Answered 100%
Correct/Verified Solutions

Which of these elements is chemically similar to magnesium?


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