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Exam 1: CHEM120 / CHEM 120
( Update 2025 / 2026) Intro to General, Organic & Biological Chemistry with Lab Review Questions & Answers - 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
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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
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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
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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
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