science
Grade-9
Easy
Question
An atom with 9 protons and 10 neutrons, will have the valence electrons of
- 5
- 9
- 7
- 10
Hint:
The number of valence electrons of an atom that has 9 protons is 7.
The correct answer is: 7
- The valence electrons are the electrons in the last shell which is the valence shell.
- In an atom, the number of electrons will be equal to the number of protons.
- The atom with 9 protons will have 9 electrons.
- The electrons are distributed in the shells based on their energy from the first shell.
- So the first shell is occupied by 2 electrons and the valence shell bears 7 electrons.
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