Unit 2 Chemical Reaction Post Test

9 Questions | By AquaMarenia | Updated: Mar 21, 2022 | Attempts: 139

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In chemistry, a reaction is a process that involves the rearranging of the molecular or ionic structures of a substance, as distinct from a change in physical form or a nuclear reaction. What do you know about them?

Questions and Answers

1.

Atom comes from the Greek word, atomos. What does it mean?
- A.
  
  Really small
- B.
  
  Unable to be cut
- C.
  
  Matter
2.

What are the three subatomic particles that make up atoms?
- A.
  
  Protons
- B.
  
  Hydrogen
- C.
  
  Electrons
- D.
  
  Neutrons
- E.
  
  Carbon
3.

What charge do protons have?
- A.
  
  Positive
- B.
  
  Neutral / No charge
- C.
  
  Negative
4.

What charge do neutrons have?
- A.
  
  Positive
- B.
  
  Neutral / No charge
- C.
  
  Negative
5.

What charge do electrons have?
- A.
  
  Positive
- B.
  
  Neutral / No charge
- C.
  
  Negative
6.

Which two make up the nucleus in an atom?
- A.
  
  Protons
- B.
  
  Neutrons
- C.
  
  Electrons
7.

Which two have the same mass?
- A.
  
  Protons
- B.
  
  Neutrons
- C.
  
  Electrons
8.

Electrons are...
- A.
  
  Are in constant motion in the space surrounding the nucleus.
- B.
  
  Are in constant motion inside the nucleas.
9.

Atoms have an equal number of _______ and _________.
- A.
  
  Neutrons
- B.
  
  Electrons
- C.
  
  Ions
- D.
  
  Hydrogen
- E.
  
  Protons