Electron Shells Flashcards
1
Q
Which shells have the lowest level of energy
A
The one nearest the nucleus
2
Q
How many electrons can the first shell hold
A
2
3
Q
How many electrons can the second shell hold
A
Up to 8
4
Q
How many electrons can the third shell hold
A
Up to 8
5
Q
How do you fill up an atom with electrons
A
2,8,8 fill from the inside outwards until you run out of electrons
6
Q
Group number equals what ?
A
The number of outer shell electrons
7
Q
The period umber equals what ?
A
How many shells there are
8
Q
Why do elements in the same group have similar chemical properties
A
Because they have the same number of electrons in their outer shell ( highest occupied energy level)
