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Chemical Interations
#122 vocab. for 1.1, 1.2,and pg. 78
Term | Definition |
---|---|
Proton | Positively charged particle |
Neutron | Uncharged particle |
Nucleus | Combination of protons and neutrons in the center of the atom |
Electron | Negatively charged particles outside the nucleus |
Atomic number | Number of protons in an atom |
Atomic mass number | Total number of protons and neutrons in an atom |
Isotope | Atoms of the same element that have different number of neutrons |
Ion | An atom that loses or gains electrons |
Atomic mass | The average mass of all the elements isotopes |
Periodic table | A table of the elements, that is arranged by their atomic number |
Group | A vertical row on the periodic table, elements have similar properties |
Period | A horizontal row on the periodic table, elements properties vary |
Law of conservation of mass | States that in chemical reactions, atoms are neither created nor destroyed |