Unit 2-4 Study Guide - PEN AvAtMass Radiation

What is the atomic mass of Neon?

• 10

• 20.18

• 10.18

• 20

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How many protons are in Beryllium?

• 4
• 9
• 5
• 2

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How many neutrons are in a Gold atom?

• 79
• 196
• 118
• 275

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How many electrons does a Copper atom have?

• 63

• 29

• 92

• 34

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What is the atomic mass of Helium

• 4.0026

• 2.0026

• 4

• 1

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What does the topmost number (3) represent?

• Mass Number

• Atomic Number

• Atomic Mass

• Number of Neutrons

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What is at the center of every atom?

• An electron

• A compound

• A molecule

• A nucleus

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Which two particles make up the nucleus of an atom?

• Protons and Electrons
• Protons and Neutrons
• Molecules and Compounds
• Neutrons and Electrons

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What is the role of an electron in an atom?

• Electrons live inside the nucleus and carry a neutral charge.
• Electrons circle the nucleus and have a positive charge.
• Electrons circle the nucleus and have a negative charge.
• Electrons live inside the nucleus and have a negative charge.

In an atom, what is the number of protons equal to?

• The number of electrons.
• The number of neutrons.
• The number of molecules.
• The number of nuclei.

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