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