A substance that cannot be broken down into simplier substances by chemical and physical means
number of protons in the atom's nucleus.
Reagons that electrons are located in
atoms with the same of protons but different6 of nuetrons
...total mass protons + neutrons
...a substance that is consists of two or more elements that are chemicaly combined.
Forces that hold atoms together...
an atom that has am electrical charge bc of a gain or loss of one or more electrons.
an atom that gains electrons become negativly charged.
when atoms shere electrons
electrons ar eshared by metal and ions
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