MEDIUM
9th CBSE
IMPORTANT
Earn 100

The isotope of carbon which has same number of neutrons as O816, is used in radiocarbon dating to determine age of old samples of living organisms.

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Important Questions on Structure of the Atom

EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 8
Cathode rays have
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 9
The isotopes of hydrogen which contain same number of electrons, protons and neutrons
MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 10
Which of the following has the highest  np ratio?
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 11
The number of valence electrons determines
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 12
Atomic number is equal to
MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 13
The difference between isotopes and isobars
HARD
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 14
'A' has 9 protons, 9 electrons and 10 neutrons. 'B' has 12 protons, 12 electrons and 12 neutrons. Formula between A and B is
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 15
In a sample of ethyl ethanoate CH3COOC2H5 the two oxygen atoms have the same number of electrons but different number of neutrons. Which of the following is the correct reason for it?