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Chemistry (Elements and Atoms (Isotopes of Hydrogen (Protium: one proton…
Chemistry
Elements and Atoms
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Atomic number (Z): number of protons in a nucleus, the number of electrons (in neutral atom)
Isotopes: Atoms of a single element(same atomic number) that differ in number of neutrons in their nuclei
Isotopes of Hydrogen
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Devterium: one proton, one electron and one neutron
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Atoms are the smallest units of matter that still retain the fundamental chemical properties of an element
Much of the study of chemistry, however, involves looking at what happens when atoms combine with other atoms to form compounds
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Ions
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Ionic compounds are compounds made up of ions. These ions are atoms that gain or lose electrons, giving them a net positive or negative charge. Metals tend to lose electrons, so they become cations and have a net positive charge. Nonmetals tend to gain electrons, forming anions that have a net negative charge.
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