Question

Write the atomic number of the element present in the third period and seven group of the periodic table

Answer 1

Write the atomic number of the element present in the third period and seventeenth group of the periodic table. ... Hence, the element in the 17th group of the third period has atomic number Z = 17 ,chlorine(Cl) with atomic mass 35.453, which is a p block element.

Answer 2

The atomic number of the element present in the third period and seven group of the periodic table is 17

Explanation:

The elements in periodic table are divided into vertical columns called as groups and horizontal rows called as periods.

The element present in the third period and seven group of the periodic table is chlorine with atomic number of 17.

Atomic number is defined as the number of protons or number of electrons that are present in an atom.

Atomic number = Number of electrons = Number of protons  = 17

Learn more about atomic number

https://brainly.com/question/13164796

https://brainly.com/question/8639165