Atoms Warm Up

An atom consists of 21 protons, 22 neutrons, and a number of electrons. Which information will be MOST helpful in determining the atom's identity?

• The number of electrons

• The number of protons

• The number of protons and neutrons

• The number of valence electrons

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

The particles that are found in the nucleus of an atom are

• neutrons and electrons
• electrons only
• protons and neutrons
• protons and electrons

Tags

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Neutrons are _______________ particles.

• negative
• positive
• neutral
• cows

electrons have this type of charge?

• negative
• positive
• neutral

Tags

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How does the size of a proton compare to the size of a electron?

• larger

• smaller

• equal

If an atom has 3 electrons, how many protons does it have?

• 1
• 2
• 4
• 3

Tags

NGSS.MS-PS1-1

How many neutrons does oxygen have?

• 16
• 15.99
• 8
• Doesn't contain any neutrons

Tags

NGSS.MS-PS1-1

How many neutrons are in a Gold atom?

• 79
• 196
• 118
• 275

Tags

NGSS.MS-PS1-1

Which group has the greatest number of valence electrons?

• 1
• 14
• 18
• 16

Tags

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