MEDIUM
9th CBSE
IMPORTANT
Earn 100

An atom has mass number 14 and 8 neutrons in its nucleus. The atom is an isotope of

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Important Questions on Structure of Atom

EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>ASSIGNMENTS FOR FORMATIVE ASSESSMENT>Q A
An element has mass number 31 and atomic number 15. The number of electrons, protons and neutrons in it are respectively
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>ASSIGNMENTS FOR FORMATIVE ASSESSMENT>Q A
Rutherford’s experiment of scattering of  α-particles showed for the first time that an atom has a:
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>ASSIGNMENTS FOR FORMATIVE ASSESSMENT>Q A
Which of the following classes of elements differ in their chemical properties?
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>ASSIGNMENTS FOR FORMATIVE ASSESSMENT>Q B
An isotope of carbon (C614) is used in dating of _____ samples.
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>ASSIGNMENTS FOR FORMATIVE ASSESSMENT>Q B
An isotope of iodine (I53128) is used in the treatment of _____.
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>ASSIGNMENTS FOR FORMATIVE ASSESSMENT>Q B
All isotopes of an element have _____ valency.
MEDIUM
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>ASSIGNMENTS FOR FORMATIVE ASSESSMENT>Q B
Isotope of uranium used in nuclear reactors is _____ metal. (Alkali / radioactive)
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>ASSIGNMENTS FOR FORMATIVE ASSESSMENT>Q B
An isotope of cobalt used in the treatment of cancer is _____ (radioactive/non-radioactive).