Question

Give one-word answers.

What are the elements of the second period known as ?

Answer 1

Modern periodic table:

• The modern periodic table is an arrangement of all the elements known in accordance with their increasing atomic number and recurring chemical properties.
• It is a tabular display of 118 chemical elements which consists of horizontal rows called periods and vertical columns are called groups.
• All elements in a group have the same number of valance electrons, and in period elements have the same number of electron shells.
• There are seven periods and eighteen groups in the modern periodic table.

Bridge elements:

• Bridge elements belong to period 2 of the periodic table.
• They basically show resemblance in properties with elements of the next group i.e. elements of the third period.
• Bridge elements show a cross or a diagonal relationship with the 3rd-period elements
• For example Beryllium and Aluminium, Boron and Silicon.