C1.1 Flashcards

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1
Q

What is the atomic number?

A

Number of protons and electrons

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2
Q

What is the mass number?

A

Number of particles in the nucleus (protons and neutrons)

Neutrons= mass number- protons

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3
Q

When different elements combine, what do they form?

A

Compounds

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4
Q

What is an element made up of?

A

One type of atom

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