Determine the period, row, group and subgroup in which the elements with serial numbers 12,35,79

Determine the period, row, group and subgroup in which the elements with serial numbers 12,35,79 are located. What are these elements called? What is their relative mass?

The task is to describe the elements with serial numbers: 12, 35, 79.

In the periodic table at number 12, there is a chemical element magnesium Mg. It is located in the 2nd group, in the 3rd period, in the 3rd row, has a relative mass of 0.024 kg.

From the periodic table at number 35, there is a chemical element bromine Br. It is located in the 7th group, in the 4th period, in the 5th row, has a relative mass of 0.08kg.

From the periodic table at number 79, there is a chemical element gold Au. It is located in the 1st group, in the 6th period, in the 9th row, has a relative mass of 0.197 kg.