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Parts of the atom


positively charged particle in the nucleus of an atom


a subatomic particle that has no charge and that is located in the nucleus of an atom


negatively charged particle; located outside the atomic nucleus


the center of the atom which contains the protons and neutrons


a region in an atom where there is a high probability of finding electrons


any substance that cannot be broken down into simpler substances


the smallest unit of matter that has the characteristics of an element; consists of three main types of subatomic particles: protons neutrons and electrons.


one of two or more atoms with the same atomic number but with different numbers of neutrons


(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight

Ionic bond

the attractive force between two ions of opposite charge


atom that has a positive or negative charge

Covalent Bond

a chemical bond that involves sharing a pair of electrons between atoms in a molecule

Atomic number

the number of protons in the nucleus of an atom

Mass Number

the total number of protons and neutrons in the nucleus of an atom


two or more atoms held together by covalent bonds

Van der Waals

a slight attraction that develops between the oppositely charged regions of nearby molecules

Polar Molecules

molecules that have an unequal distribution of charges

Inert Gasses

noble gasses, have full outer shells, and DO NOT COMBINE

Electron acceptors

Those atoms with nearly full outer levels tend to acquire electrons to fill their orbitals.

Electron Donors

Those atoms with a nearly empty outer level can find stability most easily by giving up an electron

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