Question

What pattern appears in the horizontal arrangement (rows) of the elements in the Periodic Table, moving from left to right?

Answer 1

@Soniatonia

Answer 2

are you asking what the name of the numbers are

Answer 3

I think so, @kristyn-whitaker

Answer 4

A rectangle ? :3

Answer 5

atomic number

Answer 6

Well I know that much :P

Answer 7

I have to write at least a couple sentences for the answer.

Answer 8

Its a taco :p

Answer 9

I dont think it is XD

Answer 10

Reading from left to right, they are arranged in increasing atomic number (protons )

Each period (going across) increases in atomic number
As you go down a period, they have one more ring of electrons

As you go down a column, called groups, the elements have the same number of valence electrons, which gives them similar chemical activity

Metals are on the left, nonmetals on the right and metalloids along the zig-zag line that divides the metals and nonmetals, inert gases on the far right

In general the elements do get heavier as you increase atomic number, but there are variances

Answer 11

Thank you @kristyn-whitaker