Atomic Structure Flashcards
1
Q
Charge of protons, neutrons and electrons?
A
Protons are positive
Neutrons are neutral
Electrons are negative
2
Q
Relative mass of protons, neutrons and electrons?
A
Proton - 1
Neutron - 1
Electron - 0
3
Q
What’s the atomic number?
A
The number of protons.
4
Q
What does the number of electrons equal?
A
Number of protons.
5
Q
Equation for neutron number?
A
Atomic mass - atomic number
6
Q
Maximum number of electrons in each shell?
A
1st is 2 2nd is 8 3rd is 18 4th is 32 5th is 50
7
Q
Why are atoms neutral?
A
+1 protons and -1 electrons cancel out. And neutrons are neutral so have no effect on charge.
8
Q
True or false? Electrons fill the lowest energy orbital first?
A
True.
Goes in direction of increasing energy.
