period 3
group 1
Sodium is an alkali metal, placed in period 3, group 1 of the periodic table of Mendeleev; the atomic number is 11.
Copper is located in period 4 of the periodic table.
No. Xenon is not the first period of the periodic table. It is placed in the 5th period of periodic table.
Helium is in the first period of the periodic table.
The atom right under it and in sodiums family; potassium.
Sodium, Na, is in group 1 on the periodic table. The elements in group1 are the elements in that vertical column, which are Li,Na,K,Rb,Cs,Fr.
Argon is in the third period of the modern periodic table.
Oxygen is in Period 2 , Group 16 ( VI A) of periodic table
Caesium is a Period 6 element.
No , Iodine is placed in period-5 of the periodic table.
Sulfur (S, element number 16) is on the third period of the periodic table.
A period on the periodic table is a row.This is the horizontal section of the periodic table.