Question

Bohr models notes The number of periods shows you the number of _______

Answer 1

Answer:

The number of periods shows you the number of _______

Electron Shell

Explanation:

Modern periodic table is divided into Groups and Periods.

A period is the horizontal row of the periodic table. There are seven periods in the periodic table.

It describes the following :

• The period in which a particular element found will show its electron shell

• The first period has Hydrogen and Helium = 1 - shell

• The second Period has Lithium to neon = 2- shells

A group is the vertical column of the periodic table . There are 18 groups in total.

It describes the following :

The group number of the element is same as the number of electrons in the outermost shell.

The element having group 1 has = 1 electron in outer shell (example Na, K)

The element having group 2 has = 2 electron in outer shell (example Ca, Mg)

The element having group 0 has = full outer shell (example Ne Xe). these are also known as noble gases