Section 3: Sub- atomic particles Flashcards
1
Q
mass number
A
the total number of protons and neutrons
2
Q
Atomic number
A
The number of protons. ( the number of electrons is the same in an atom)
3
Q
Electron configuration
A
Electrons fill the first energy level (shell) first.
Maximum electrons: 2 electrons in the first shell, 8 in the second and 8 in the third.
4
Q
What is the mass of a proton?
A
1
5
Q
What is the charge of a proton?
A
+1
6
Q
What position in the atom is a proton in?
A
nucleus
7
Q
What is the mass of a neutron
A
1
8
Q
What is the charge of a neutron?
A
0
9
Q
What position in the atom is a neutron in?
A
nucleus
10
Q
What is the mass of an electron?
A
very small
11
Q
What is the charge of an electron?
A
-1
12
Q
What position in the atom is an electron in?
A
Orbiting in the shells
