SSC (English Medium) १० वीं कक्षा - Maharashtra State Board Question Bank Solutions for Science and Technology 1

Match the columns.

The number of electrons in the outermost shell of an atom determines the _______.

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.

Write the name.

The sensation on the retina persists for a while is

Write the name.

The persons which are unable to distinguish between different colours

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 an Explanation.

Persistence of vision

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.