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Atoms & PT Review
Early review of atoms and periodic table
Question | Answer |
---|---|
protons | subatomic particle with positive charge |
neutrons | subatomic particle with neutral (no) charge |
electrons | subatomic particle with negative charge |
Mendeleev | made the first periodic table |
nucleus | where protons and neutrons are found in atom |
atoms | the building blocks of all matter |
electron cloud | where electrons are found |
atomic number | the number of protons |
atomic mass | the sum of protons and neutrons |
period | horizontal rows on periodic table |
group/family | vertical columns on periodic table |
periodic table | list of all known existing elements |
s, p , d, f | blocks on the periodic table |
metals | most of the elements are classified as this (shiny, solids, good conductors of heat and electricity) |
metalloids | B, Si, As, Te, At, Ge, Sb ;have properties of metals and non-metals |
18 | number of groups on the periodic table |
7 | number of periods on the periodic table |