Atomic History & Structure

Neutrons are found in the...

• Nucleus
• Electron Cloud
• Electrons
• Protons

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NGSS.MS-PS1-1

Electrons have a ___________ charge.

• Positive
• Negative
• Neutral

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NGSS.HS-PS2-4

The _____________ is the number of protons and neutrons in an atom.

• Atomic Mass
• Atomic Symbol
• Atomic Number
• Atomic charge

Tags

NGSS.MS-PS1-1

The _____________ determines the identity of an object.

• # of Protons
• # of Electrons
• # of Neutrons
• Atomic Mass

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NGSS.MS-PS1-1

Who believed that electrons were scattered amongst positively charged material.

• JJ Thomson
• Ernest Rutherford
• John Dalton
• Niels Bohr

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NGSS.HS-PS1-3

Believed that atoms are small, hard particles that were "indivisible"

• Democritus
• Aristotle
• Schrodinger
• Greek Philosophers

Discovered that the atom has a small, dense, positively charged nucleus.

• Ernest Rutherford
• Heisenberg
• Democritus
• JJ Thomson

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NGSS.HS-PS1-8

Believed that electrons traveled around the nucleus in definite paths.

• Niels Bohr
• John Dalton
• Modern Atomic Theory
• Ernest Rutherford

How many protons does an atom with an atomic number of 28 and a mass number of 40 have?

• 28
• 68
• 12
• 40

Tags

NGSS.MS-PS1-1

The following element has _____________ electrons.

• 114
• 289
• 175
• 403

Tags

NGSS.MS-PS1-1