Test Flashcards
1
Q
Who discovered neutrons
A
Chadwick in 1932
2
Q
What is the maximum of electrons the first shell can hold
A
Two
3
Q
What is the maximum number of electrons in the second shell
A
Eight
4
Q
What is the maximum number of electrons in the third shell
A
Eight
5
Q
What is the magic rule
A
2.8.8
6
Q
Who came up with the idea of electrons energy level
A
Neil Bohr
7
Q
What did Bohr say
A
He said electrons go round the tiny positive nucleus in electron shells
8
Q
What is the number on the top called
A
Mass number
9
Q
What is the bottom number called
A
Atomic number
