it has two element (hydrogen and helium) that are both gases although they are metallic and have a luster like tony baloney
Helium is in the first period of the periodic table.
Sodium, Na, is in group 1 period 3 on the periodic table.
Lithium is in the first period of the periodic table. It is the first element in the alkali metal group.
The group no. of Lithium is 1 and its period number is 2.
Helium is located in period 1 on the periodic table.
Helium is in the first period of the periodic table.
Hydrogen is located on the first period; the first row in the periodic table.
Period 1 refers to the top row of the periodic table. These elements are Hydrogen and Helium.
Hydrogen is found in group 1 row 1 of the periodic table
Sodium, Na, is in group 1 period 3 on the periodic table.
1
Lithium is in the first period of the periodic table. It is the first element in the alkali metal group.
Period 1
it has two element (hydrogen and helium) that are both gases although they are metallic and have a luster like tony baloney
The first period of the periodic table's elements all have 1 energy level.
period 3 group 1
Francium is in the period 7 and group 1 of the periodic table (alkali metals).