Unit 2 Review- History, Atomic Structure, Electron Configuration

The nucleus contains which subatomic particles?

• Protons and electrons

• Protons and neutrons

• Neutrons and electrons

• Protons, electrons, and neutrons

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The nucleus is surrounded by:

• Protons

• Neutrons

• Electrons

• Positrons

The atomic number is always equal to the number of:

• Neutrons

• Electrons

• Protons

• Positrons

If an electrically neutral element has 10 protons and 12 neutrons, how many electrons does it have?

• 10

• 12

• 22

• 2

An atom is electrically neutral when:

• Electrons = neutrons

• Neutrons = protons

• Protons = electrons

Mass of a proton is the same as the mass of:

• electron

• neutron

The number of electrons in an atom of neon (Ne):

• 9

• 10

• 19

• 1

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Subatomic particle with the least mass:

• Electron

• Proton

• Neutron

If the mass number of an element is 48 and atomic number is 20, how many neutrons are in that element?

• 20

• 28

• 68

• 20

Protons and neutrons have:

• Same mass, different charges

• Same mass, same charges

• Different mass, different charges

• Different mass, same charge

Tags

NGSS.HS-PS1-8