group 18
The periodic table has 18 groups ant 7 periods. Hydrogen and helium are considered members of the first period.
Helium has 2 valence electrons and hydrogen has 1 electron. So, they are placed in different groups.
last 6 except helium :)
Main group elements have elements from groups 1 and 2, except hydrogen and groups 13 to 18. Main group elements are elements in groups who's lightest elements are shown by helium, lithium, boron, beryllium, carbon, nitrogen, oxygen, and fluorine.
Do you mean helium? Helium is an element, so it's made of .... helium!
The periodic table has 18 groups ant 7 periods. Hydrogen and helium are considered members of the first period.
Helium has 2 valence electrons and hydrogen has 1 electron. So, they are placed in different groups.
last 6 except helium :)
No. they belong to different groups and hence have different properties
1
Main group elements have elements from groups 1 and 2, except hydrogen and groups 13 to 18. Main group elements are elements in groups who's lightest elements are shown by helium, lithium, boron, beryllium, carbon, nitrogen, oxygen, and fluorine.
Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen.
Helium Helium
Do you mean helium? Helium is an element, so it's made of .... helium!
helium in a jar diff from helium atom
Helium has 2 protons, 2 neutrons and 2 electrons. The symbol for helium is He and the atomic number is 2.
He- Helium. He- Helium.