how many elements are in the first period of the periodic table?

4 ⤊

2006-10-12 16:32:44 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

Periods run horizontally. There are only two elements in the first period Hydrogen and Helium.

2006-10-12 16:35:26 · answer #1 · answered by Jude M 3 · 2⤊ 0⤋

You may found the complete answer in this website

2006-10-12 16:39:20 · answer #2 · answered by safron116 1 · 0⤊ 1⤋

2 .... hydrogen and helium

2006-10-12 16:40:01 · answer #3 · answered by Jill 2 · 1⤊ 0⤋

hydrogen and helium

2006-10-12 16:43:04 · answer #4 · answered by Anonymous · 0⤊ 1⤋

2
H and He

2006-10-12 16:34:18 · answer #5 · answered by Anonymous · 1⤊ 0⤋