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lithium is the third element. It is placed in group-1
they are found as element because in group 1 they react
Francium
lithium
Sodium has the configuration Ne 3s2 . Sodium is group-1 element.
7th period because atomic size down the group increases. And Alkali Earth metals are found only in Group 1. The element is in Group 1 and period 7
If you mean in the group {1, -1, i, -i, j, -j, k, -k}, the identity element is 1.
If we look at the periodic table, we can see that the first element in Group I is Hydrogen.
Hydrogen is the smallest element. It has only 1 energy level. It is a gas element.
lithium is the third element. It is placed in group-1
That element would be in the Alkali Metals (group one)
An atom of an element is usually smaller than a molecule of a compound. Molecules are made by bonding 2 or more atoms, of one or more elements. The molecule is the smallest particle of a compound.
element K, or potassium
Sodium has the largest atomic size in the third period.
The element Hydrogen is in the group number 1.
group 1
Hydrogen is in group 1 but is not an alkali metal.