SSC (English Medium) १० वीं कक्षा - Maharashtra State Board Question Bank Solutions

Write the name.

The element having stable electron configuration from the third period.

Write the name.

Highest electropositive element

Write the name.

The group of elements having electronic configuration 2, 2.

The valency of the elements in group 2 is 1.

The elements lithium and beryllium are in the same period because their valencies are similar.

Beryllium and calcium are alkaline earth metals.

The number of shells decreases in a group from top to bottom.

Electric motors are devices that convert electrical energy into mechanical energy.

India is the first country to discover the existence of water on the moon.

Write an Explanation.

Group

Write scientific reason.

Boron and oxygen elements are placed in the second period in periodic table.

In group 2, beryllium and calcium elements, calcium is more electropositive element than beryllium.

Complete the following chart.

Find the period in which these elements can be placed.

₄Be, ₁₇Cl, ₂He, ₁₃Al

Electronic configuration of element A is 2,8,1. Answer the following questions based on this information.

1. What is the atomic number of element A?
2. Find the group to which this element belongs.

What is an electric motor?

In which electric motor appliances do we use it?

Distinguish between:

Group - Period

Write a short note.

Moon missions

Write name of elements, symbol, atomic number, electronic configuration of second period in modern periodic table?