Elements and Atomic Structure

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Calculation used to find the number of neutrons in an atom

• Mass Number- Atomic Number

• Atomic Number - Mass Number

• Mass Number - Electrons

• protons = electrons = neutrons

All matter is made of 

• energy 

• atoms 

• air

• chemistry

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What is the smallest type of a pure substance?

• compound

• element

• mixture

• colloid

Using your periodic table, how many protons does Helium have?

• 2

• 8

• 12

• 7

Examine the following model of an atom.

What is the atomic mass of this element?

• 7

• 17

• 14

• 28

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What is the atomic number?

• 12

• 6

• 36

• 18

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The atoms of any element have a unique number of _______.

• neutrons

• protons

• nuclei

• electrons

The atomic number is the number of _____ in the nucleus of an atom.

• electrons

• neutrons

• ions

• protons

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A sodium atom can easily lose an electron. What happens to this electron?

• It is converted into thermal energy.

• It is destroyed.

• It is transferred to an atom of a different element.

• It is transferred to another sodium atom.

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