Question

What do all elements in a column in the periodic table have in common?


Their atoms have the same number of valence electrons.
Their atoms have the same atomic mass.
Their atoms have the same number of protons and electrons.
Their atoms have the same number of neutrons.

Answer 1

Can you explain why please

Answer 2

http://www.chem4kids.com/files/elem_pertable.html

Answer 3

So A

Answer 4

@JFraser

Answer 5

@Abhisar

Answer 6

Elements in the coloumn have same valence shell electronic configuration and thus have same number of valence shell electrons.

Answer 7

For example,
Lithium, Sodium, Potassium all are placed in 1st coloumn and have same number of valence shell electron i.e 1

Answer 8

Got it ?

Answer 9

So A is correct got it thanks