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Chapter 3

chemistry is the study of composition, structure properties of matter
gamma rays are electromagnetic waves
which of the folowing processes always decreases the number of protons by a even number alpha decay
who called the atom a atom Democritus
a nuclied is identified by the number of protons and neturons in its nucleous
an atom of potassium has 19 protons and 20 neutrons, what is its mass number 39
the discovery of electrons resulted from experiments using cathode rays
which instrument detect radiation by counting electric pulses carried by ionized gas atoms geiger-muller counters
who discovered the nucleous by bombarding gold foil with positively charged particles rutheford
in a glass tube electrical current passes from the negativeelectrodde called the to the other electrode cathode
Created by: Frankie17