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QuestionAnswer
protons have a charge of positive
neutrons have a charge of neutral
electrons have a charge of negative
group 1 = +1
group 17 = -1
element a pure chemical substance made of same type of atoms
compound contains atoms of different elements chemically combined together
molecule two or more atoms join together chemicaly
mass number neutrons + protons
atomic number protons
who discoverd the most recent diagram of an atom rutherd
how did rutherd know that ther was a nucleus kn the middle of the atom when he shot alpha particles at the foil leaf the particles reflected and came back making him think there must be something hard in the middle (neuclues)
Created by: cathiec
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