Electrons and Energy Levels

Electrons and Energy Levels

Let's Review what we learned last week!

Match

Match the terms below.

• Protons have a ______ charge.

• Neutrons have a ______ charge.

• Electrons have a ______ charge.

positive

neutral

electrons

• positive

• neutral

• electrons

Multiple Choice

The ______ ______ is the number of protons in each atom of that element.

• atomic number

• atomic mass

Fill in the Blanks

A row on the periodic table is called a

Fill in the Blanks

A column on the periodic table is called a

How does this all connect?

• Different electrons in an atom have different amounts of energy.

• Electrons closest to the nucleus have the least amount of energy.

• Electrons farthest from the nucleus have the greatest amount of energy.
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Electrons and Energy

Fill in the Blanks

How many electrons can the 1st level hold?

Fill in the Blanks

How many electrons can the 3rd level hold?

Fill in the Blanks

How many electrons can the 2nd level hold?

Valence Electrons

is an outermost electron of an atom that participates in chemical bonding.

Fill in the Blanks

How many valence electrons does the element sodium (Na) have?

Fill in the Blanks

How many valence electrons does the element Silicon (Si) have?

Fill in the Blanks

How many valence electrons does the element Neon (Ne) have?

​Group 1 is one of the most reactive because it only has 1 valence electron.

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