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Acid

• Proton donor

• source of H+ ions

• Proton acceptor

• source of OH- ions

Allotropes

• Different forms of same element

• Same number of protons, different number of electrons

• Same number of protons, different number of neutrons

Isotope

• Different forms of same element

• Same number of protons, different number of electrons

• Same number of protons, different number of neutrons

Anion

• Negative ions

• atoms gain electrons

• positive ions

• atoms lose electrons

Aqueous

• Chemicals dissolved in water

• Chemicals containing water

• Water reacting with chemicals

Atomic number

• Number of protons in an atom

• Number of neutrons in an atom

• Number of protons and neutrons

Isotope

• Number of protons in an atom

• Number of neutrons in an atom

• Number of protons and neutrons

Base

• Proton acceptor

• Source of OH- ions

• Proton donor

• Source of H+ ions

Boiling

• Change of state from a liquid to gas

• Change of state from gas to liquid

• Change of state from liquid to solid

• Change of state from solid to liquid

Freezing

• Change of state from a liquid to gas

• Change of state from gas to liquid

• Change of state from liquid to solid

• Change of state from solid to liquid