Exam 1: CHEM120 CHEM 120

Exam 1: CHEM120 / CHEM 120

(Latest Update 2025 / 2026) Intro to General, Organic & Biological Chemistry with Lab | Review Questions & Answers | Grade A | 100% Correct - Chamberlain

Question:

What is the charge of each:

A molecule with 14 total electrons and 12 total protons_____. An atom with 55 protons and 54 electrons______. An atom with 12 protons and 10 electrons______. A molecule with 76 electrons and 73 protons ______

Answer:

-2 +1 +2 -3

• / 4

Question:

If an atom of F were to form an ion, how many electrons would you think an atom of this element would gain or lose?

• Gain two electrons
• Lose one electron
• Lose two electrons
• Gain one electron

Answer:

Gain one electron

Question:

Sort the following as a cation vs an anion.

Answer:

Anion- O2-, OH-, An atom with more electrons than protons

Cation- H3O+,Mg2+, An atom with more protons than electrons

• / 4

Question:

Select all of the following that would be classified as an ion.

• Fe3+
• F-
• MgS
• C4H10
• PO43-

Answer:

Fe3+ F- PO43-

Question:

Which of the following would you expect to form a molecular compound?

Answer:

Hydrogen and sulfur

• / 4

Question:

A molecule has more electrons than protons. I would expect this molecule to

be classified as a(n):

• Cation
• Element
• Anion
• Isotope

Answer:

Anion

Question:

What do O, S, and Se have in common? Select all that apply.

Answer:

They are all non-metals

They are members of the same group

They have the same number of valance electrons

• / 4