Chemistry: Question Preview (ID: 881)

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Which scientist came up with the term Atom?
a) Democritus
b) Dalton
c) J.J Thomson
d) Ernest Rutherford

Which scientist discovered the electron in atoms?
a) Democritus
b) Dalton
c) J.J Thomson
d) Rutherford

How do you find the number of neutrons in an atom?
a) Same as the atomic number
b) Same as the number of protons
c) Same as the mass of the atom
d) Subtract the atomic number from the atomic mass

What are the charges of the electron, protron , and neutron? In that order
a) negative, neutral, and positive
b) neutral, negative, and positive
c) positive, neutral, and negative
d) negative, positive, and neutral

What part of the subatomic particles are found in the nucleus?
a) electrons and protons
b) electrons and neutrons
c) protons and neutrons
d) electrons, protons and neutrons

Why does an atom have a neutral charge?
a) equal number of protons and neutrons
b) equal number of neturons and electrons
c) odd number of neutrons
d) equal number of protons and electrons

If an atom an atomic number of 24 and a mass of 49, how many protons does the atom have?
a) 24
b) 49
c) 73
d) 25

The atomic mass of an atom is equal to the number of:
a) electrons
b) neutrons
c) protons and electrons
d) protons and neutrons

Use a periodic table, how many protons,
a) catalysis
b) precipitate
c) inhibitor
d) solution

When steel wool in put into vinegar a chemical reactions starts and the temperature rises. This is an example of a:
a) endothermic reaction
b) exothermic reaction
c) physical change
d) physical property

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