Chemistry Regents Quick Facts

Charge of an electron

• Positive

• Negative

• Neutral

Charge of an proton

• Positive

• Negative

• Neutral

Charge of a neutron

• Positive

• Negative

• Neutral

How do you know the number of protons

• Atomic Number

• Mass Number

Overall charge of an atom

• Positive

• Negative

• Neutral

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An atom with a charge.

• Ion

• Electrolyte

• Neutral

How do you find the number of electrons in an atom

• Same as Mass

• 8

• 0

• Same as Atomic #

How do you find the number of neutrons?

• 0

• Same as protons

• Mass-Protons

• Protons - Electrons

Isotopes have... (CHECK ALL THAT APPLY)

• Same number of protons

• Different number of neutrons

• Different number of electrons

• Different Masses

• Different Atomic Numbers

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Rutherford's Gold Foil...(Check all the apply)

• Atom is mostly empty space

• Small, dense, positively charged nucleus

• Electrons are surrounding the nucleus

• Some particles deflected (bounced back)

• Most particles passed through