Atoms and Octet rule Flashcards
1
Q
what are shells
A
Shells are energy levels which contain electrons which orbit the nucleus of an atom.
2
Q
2,8,8,2 model means?
A
The 1st shell of a atom contains a
maximum of 2 electrons.
The 2nd shell of a atom contains a
maximum of 8 electrons.
The 3rd shell of a atom contains a
maximum of 8 electrons.
The 4th shell of a atom contains a
maximum of 2 electrons.
3
Q
what is the max amount of electrons in the first shell of an atom
A
2 electrons
4
Q
what is the max amount of electrons in the second shell of an atom
A
8 electrons
5
Q
what is the max amount of electrons in the third shell of an atom
A
18 electrons if the mass number is more than 20
8 electrons if mass number less than 20
6
Q
what is the max amount of electrons in the 4th shell of an atom
A
2 electrons
