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9th CBSE
IMPORTANT
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An atom has an atomic mass number 23 and atomic number 11. The atom has electrons.

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Important Questions on Structure of Atom

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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Very Short Answer Type Questions>Q 27
An atom of an element has 11 protons, 11 electrons and 12 neutrons. The atomic mass number of the atom is _____. 22/ 23
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Very Short Answer Type Questions>Q 27
If the nucleus of an atom has an atomic number17, mass number37 and there are17electrons outside the nucleus, the number of neutrons in it is _____.
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Very Short Answer Type Questions>Q 27
Almost all the mass of an atom is concentrated in a small region of space called the _____.
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Very Short Answer Type Questions>Q 27
Cathode rays are a beam of fast-moving _____. (protons/ electrons)
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Very Short Answer Type Questions>Q 27
The anode rays obtained from hydrogen gas consist of particles called _____.
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Very Short Answer Type Questions>Q 27
The maximum number of electrons that can be accommodated in the L shell is_____.
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Very Short Answer Type Questions>Q 27
The maximum number of electrons that can go into the M shell is _____.
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Very Short Answer Type Questions>Q 27
The subatomic particle not present in a hydrogen atom is _____.