Semester Review #2: Unit 4 & 5: Modern Atomic Theory & Bonding

These particles are found in the nucleus of the atom.

• protons only

• protons and electrons

• electrons only

• protons and neutrons

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NGSS.HS-PS1-4

NGSS.HS-PS1-8

The mass number is the total of the protons plus the neutrons in the atom.

• True

• False

How many neutrons would you expect the average gold atom to have given the information shown?

• 79

• 118

• 197

• 276

Tags

NGSS.HS-PS1-8

Which subatomic particle has a negative charge?

• proton

• electron

• neutron

• quark

The section labeled D is known as the?

• Electron cloud
• Neutron
• Nucleus
• Electron

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NGSS.HS-PS1-8

Value representing the number of protons in an element

• Atomic Mass
• Mass Number
• Valence Electrons
• Atomic Number

What is the atomic number of this atom?

• 2
• 4
• 6
• none of the above

Tags

NGSS.HS-PS1-1

What is the mass number of this atom?

• 1
• 3
• 4
• 7

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NGSS.HS-PS1-8

How many valence (outer) electrons does an Oxygen atom have?

• 2

• 6

• 8

• 16

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NGSS.MS-PS1-1

What's a valence electron?

• electrons in the second energy level
• electrons in the outermost energy level
• the atomic number
• electrons in the first level

Tags

NGSS.HS-PS1-1

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