Can anyone explain the periodic table?

  • 1 vote

I would please like to know all the different numbers of each Element in the Periodic table. The top number, bottom left number and the ordering. Thank you 

Posted Fri 3rd June, 2011 @ 12:47 by Anna Berryman

2 Answers

  • 3 votes

The modern periodic table is ordered according to the atomic number (number of protons in the nucleus of the atom).

The number at the bottom is the atomic number ( the number of protons in the nucleus)

The number at the top is the relative atomic mass (how many protons and neutrons there are in the nucleus of the atom.)

For example, Oxygen would be written as




Where the 16 is the relative atomic mass, the O stands for Oxygen (is the atomic symbol) and the 8 means there is 8 protons in the nucleus (and there 8 electrons in the nucleus). 

Answered Fri 3rd June, 2011 @ 12:54 by emma
  • 1 vote

as well as wha emma said

the groups represent the number of electrons in the outer shell

the period represents the number of shells

there is a line that looks like some stairs on the right side to seperate the metals from the non metals, its kind of hard to explain without a periodic table.

the middle block where there are no group numbers above are called the transition metals

Answered Fri 3rd June, 2011 @ 15:52 by Pui Pui