- A negatively charged atom or molecule.
- A positively charged atom or molecule.
- The elements that only are found in nature as pairs covalently bound together, for example oxygen (O2) and hydrogen (H2).
- The arrangement of electrons in the orbitals of an atom.
- Forms of an element that have the same number of protons, but different numbers of neutrons.
- Describes matter that with increased heat or pressure can have its shape changed, as if it had been hit by a hammer.
- The probable location and energy state of electrons.
- Charged molecules with more than one atom.
- A quantum mechanical property associated with an electron that can be plus or minus one-half.
- In general, the electrons in the outermost shell (the shell with the highest number). For most common elements, these are the s and p electrons.
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