Practice Test

Question 1

How is this model useful?

Revolt · Accepted Answer

D: It shows how electrons are distributed in the shells of an iron atom.

Question 2

Based on the table, which atom has a charge of negative 1 ?

Revolt · Accepted Answer

B: 2

Question 3

Based on these data, what is the average atomic mass of element cap b ?

Revolt · Accepted Answer

D: 10 point 8 1

Question 4

A piece of sodium metal can be described as

Revolt · Accepted Answer

C: a pure substance and an element.

Question 5

Which shows the electron configuration for Silicon Si ?

Revolt · Accepted Answer

D: Ne times 3 times s squared times 3 times p squared

Question 6

What is the electron configuration for helium He ?

Revolt · Accepted Answer

B: 1 s squared

Question 7

Which is a set of valid quantum numbers?

Revolt · Accepted Answer

B: n is equal to 4 ,  l is equal to 3 ,  m is equal to 3; D: n is equal to 4 ,  l is equal to 4 ,  m is equal to 4

Question 8

What is the predicted order of first ionization energies from highest to lowest for lithium ( Li ), sodium ( Na ), potassium ( cap k ), and rubidium ( Rb )?

Revolt · Accepted Answer

C: Rb is greater than cap k comma cap k is greater than Na comma Na is greater than Li; D: Li is greater than Na comma Na is greater than cap k comma cap k is greater than Rb

Question 9

An electron in a hydrogen atom moves from level 3 to level 1. In a second hydrogen atom, an electron drops from level 2 to level 1. Which statement describes the most likely result?

Revolt · Accepted Answer

A: The second atom emits light with more energy.; C: The first atom emits light with more energy.

Question 10

Which element would most likely have chemical properties similar to that of magnesium ( Mg )?

Revolt · Accepted Answer

B: Ar; C: Ca

Practice Test Answers

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