Physical Science Exam Review -- Chemistry Section

The scientist credited with forming the theory that all matter is made of tiny particles called atoms is

• Dalton

• J.J. Thomson

• Rutherford

• Bohr

The scientist credited with the discovery of the electron is

• Dalton

• J.J. Thomson

• Rutherford

• Bohr

The scientist who discovered the existence of a closely packed positive region of the atom that is now known at the nucleus is

• Dalton

• J.J. Thomson

• Rutherford

• Bohr

The famous "gold foil" experiment was performed by

• Dalton

• J.J. Thomson

• Rutherford

• Bohr

Tags

NGSS.HS-PS1-8

What kind of charge does the center of an atom have?

• a positive charge

• a negative charge

• no charge at all

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NGSS.HS-PS1-8

Which particles are found in the nucleus of an atom?

• electrons and protons

• protons and neutrons

• electrons and neutrons

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Which two subatomic particles have about the same mass?

• electrons and protons

• protons and neutrons

• electrons and neutrons

The atomic number of an atom is the same as its number of

• protons

• neutrons

• nucleons

If two atoms have different numbers of protons, what do you know about the atoms?

• they are atoms of two different elements

• they have different numbers of neutrons

• they have different mass numbers

In a neutral atom, the number of protons is equal to the

• number of neutrons

• number of electrons

• number of nucleons

Tags

NGSS.HS-PS1-7