EASY
9th CBSE
IMPORTANT
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When aluminium atom changes to aluminium ion it:

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Important Questions on Structure of Atom

EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 29
The non-metal with one valence electron is:
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9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 30
The noble gas having 2 valence electrons is:
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9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 31
The general name of elements having 8 valence electrons is:
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9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 32
Which of the following is a metal which has two valence electrons?
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9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 33
Select a pair of isotopes from the following list:
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9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 34
Isotopes of an element have:
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9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 35
Inert gases from the following list are: 
List: H, He, Na, Ne, Au, Ar, K, Kr
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 36
Isotopes of an element are electrically neutral because they have same number of: