Question

Give a one-word answer.

Elements of the second period are 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.

Second period:

• The second period has 8 elements in it.
• The second period contains the elements lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, and neon.
• They contain two electron shells and they are also called Bridge elements.
• They basically show resemblance in properties with elements of the next group i.e. elements of the third period.
• This close resemblance can be due to several physical factors such as comparable atomic radius, electronegativity, the polarization of atoms, etc.
• Bridge elements show a cross or a diagonal relationship with the 3rd-period elements. For example Be & Al, B & Si.