Atoms, Compounds, And Elements Pretest

10 Questions | By Traciwilliams | Last updated: Mar 21, 2022 | Total Attempts: 363

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This quiz is a pretest to the physical science unit (8th grade level) which covers atomic theory, atomic structure, molecules, compounds, and elements.

Questions and Answers

1.

What contribution to the atomic theory did Neils Bohr make?
- A.
  
  He discovered the electron.
- B.
  
  He theorized a model of atomic structure
- C.
  
  He discovered the proton.
- D.
  
  He viewed an atom for the first time using an instrument.
2.

Which of the following are parts of an atom? (Choose all that apply)
- A.
  
  Neutron
- B.
  
  Compound
- C.
  
  Electron
- D.
  
  Nucleus
- E.
  
  Atomic bond
- F.
  
  Proton
- G.
  
  Element
- H.
  
  Electron shell
3.

Where in the atom are the electrons found?
- A.
  
  Inside the nucleus
- B.
  
  Outside the nucleus
- C.
  
  Orbitting through the nucleus
4.

What makes an atom able to form a compound?
- A.
  
  Same number of protons as electrons
- B.
  
  Different number of neutrons than protons
- C.
  
  Unfilled outer electron shells
- D.
  
  A positive or negative charge of the nucleus
5.

What charge does the nucleus of the atom have?
- A.
  
  Positive
- B.
  
  Neutral
- C.
  
  Negative
6.

Which scientists was the first to use the term "atom"?
- A.
  
  Democritus
- B.
  
  John Dalton
- C.
  
  JJ Thomson
- D.
  
  Albert Einstein
7.

How does an isotope differ from another atom of the same element?
- A.
  
  The number of neutrons is different
- B.
  
  The number of protons is different
- C.
  
  The number of electrons is different
- D.
  
  The shape is different
8.

A pure substance that cannot be separated into simpler substances is called a(n)
- A.
  
  Isotope
- B.
  
  Atom
- C.
  
  Element
- D.
  
  Compound
9.

A pure substance that is composed of two or more elements that are chemically combined is a(n)
- A.
  
  Isotope
- B.
  
  Atom
- C.
  
  Element
- D.
  
  Compound
10.

The particle(s) that make up the mass of an atom is (are)
- A.
  
  Electrons
- B.
  
  Neutrons
- C.
  
  Protons
- D.
  
  Electron shells