Question

how i can identify group and period instantly​

Answer 1

Answer:

1. The period of element relates the number of shells of an atom of the given element.

2. The group is similar to the no of valence electrons of given element.

3. The valency is the no of electrons it accepts or donates. So in case of non-metals valency = 8-valence electrons & in case of metals valency=valence electrons... This is B’COZ non-metals accept so lacked electrons only considered.

4. The number of element in each period is calculated by 2n2.

Answer 2

Answer:

we identify the group and period in modern periodic table by using their atomic number.

Explanation:

By using atomic number of any elements in periodic table we can identify it's group and period to which they belongs.