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Questions

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6 questions · timed · auto-graded

Question 11 Mark

Isotopes are the atoms of $.........$ element having the $.........$ atomic number but $.........$ mass number

Answer

Isotopes are the atoms of same element having the same atomic number but different mass number.

Question 21 Mark

Neutrons are $.........$ particles having mass equal to that of protons.

Answer

Neutrons are neutral particles having mass equal to that of protons.

Question 31 Mark

The $.........$ of an atom is very hard and dense.

Answer

the nucleus of an atom is very hard and dense.

Question 41 Mark

The outermost shell of an atom is known as $.........$

Answer

The outermost shell of an atom is known as valence shell.

Question 51 Mark

An ion which has a positive charge is called a $.........$

Answer

An ion which has a positive charge is called a cation .

Question 61 Mark

Dalton $.........$ that atoms could not be divided .

Answer

Dalton said that atoms could not be divided .

Fill in the blanks. - CHEMISTRY STD 8 Questions - Vidyadip

CHEMISTRY Fill in the blanks.