Atoms

Atoms

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Poll

How comfortable are you with understanding what atoms are made of and how the atom is structured?

• VERY COMFORTABLE!!!

• Eh, pretty comfortable

• I get it a little...

• What are atoms?

What are atoms made of?

Atoms are made of Protons and Neutrons, located in the Nucleus, and Electrons around the outside of the nucleus.

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What particles are atoms made of? (Check ALL that apply:)

• Protons

• Neutrons

• Electrons

• Nucleus

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What particles are in the nucleus?

• Protons

• Neutrons

• Electrons

• Nucleus

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Which particle is outside the nucleus?

• Protons

• Neutrons

• Electrons

• Nucleus

Protons, Neutrons, and Electrons:

• Protons and neutrons have mass.

• Electrons don't have mass.

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Which two particles have mass?

• Protons

• Neutrons

• Electrons

• Nucleus

Particle Charges:

Protons are positively charged.

Neutrons are neutrally charged.

Electrons are negatively charged.

Multiple Choice

Protons are:

• Positive

• Neutral

• Negative

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Neutrons are:

• Positive

• Neutral

• Negative

Multiple Choice

Electrons are:

• Positive

• Neutral

• Negative

Valence Electrons

Electrons on the outter shell are called "valence electrons."

The first shell can hold 2 electrons.

The 2nd shell can hold 8 electrons.

The 3rd shell can hold 8 electrons.

Multiple Choice

How many valence electrons in this diagram:

• 1

• 3

• 5

• 7

Multiple Choice

How many valence electrons in this diagram:

• 1

• 3

• 5

• 7

Multiple Choice

How many valence electrons in this diagram:

• 1

• 3

• 5

• 7

Reactivity

• The noble gasses (group 18) are non-reactive.

• Group 1 and 17 are the most reactive.

• If the atom has 1 valence electron it is easily lost and reacts easily (group 1)

• If the atom has 7 valence electrons it wants to grab 1 more and reacts easily (group 17)

Multiple Choice

Which atom is the most reactive?

Multiple Choice

Which atom is the most reactive?

Multiple Choice

Which atom is the least reactive?