What is the charge of a proton?
1+
0
1-
What is the charge of an electron?
0
1+
1-
What is the mass of a neutron?
2
Almost zero
1
What is the mass of an electron?
Almost zero
1
1-
What is the charge of an ion which has lost an electron?
Neutral
Positive
Negative
What is the charge of an ion which has gained an electron?
Positive
Neutral
Negative
What is the atomic number of an atom?
The number of neutrons
The number of protons
The number of electrons
What is the mass number of an atom?
The number of protons and neutrons
The number of protons and electrons
The number of electrons and neutrons
What are isotopes?
Atoms of the same element with different numbers of electrons
Atoms of the same element with different numbers of protons
Atoms of the same element with different numbers of neutrons
How many neutrons does hydrogen-3 have?
2
1
0