15 questions
Subatomic particles with a negative charge
Electrons
Neutrons
Protons
Quarks
Look at this picture of Argon off the periodic table. Which of the following is true for this element?
18 protons
40 protons
22 protons
21.9 protons
Which part of an atom is used to identify it?
number of protons
number of neutrons
number of electrons
The atomic mass of an atom is equal to
number of protons plus number of neutrons
number of protons plus number of electrons
number of electrons plus the number of neutrons