[ 1 mark questions ]

Questions

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7 questions · timed · auto-graded

Question 11 Mark

What is the same about the electron structures of:

Question 21 Mark

For an atom ‘X’, K, L and M shells are completely filled. How many electrons will be present in it?

Question 31 Mark

Name an element which has the same number of electrons in its first and second shell.

Question 41 Mark

Bromine, carbon, hydrogen, aluminium.

Question 51 Mark

Copper, brass, gold ornament, bronze.

Question 61 Mark

There are 5 periods and 17 groups in the modern periodic table.

Question 71 Mark

The elements of group 13 are called the carbon family.

[ 1 mark questions ] - Science STD 9 Questions - Vidyadip

Science [ 1 mark questions ]