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9th CBSE
IMPORTANT
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Which of the following represents the correct electron distribution in magnesium ion?

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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>Multiple Choice Questions (MCQs)>Q 65
The correct electronic configuration of a chloride ion is :
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Multiple Choice Questions (MCQs)>Q 66
Goldstein's experiments which involved passing high voltage electricity through gases at very low pressure resulted in the discovery of :
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Multiple Choice Questions (MCQs)>Q 67
The number of electrons in the atom of an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of an atom of this element?
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Multiple Choice Questions (MCQs)>Q 68
The ion of an element has 3 positive charges. The mass number of an atom of this element is 27 and the number of neutrons is 14. What is the number of electrons in the ion?
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Multiple Choice Questions (MCQs)>Q 69
The first model of an atom was given by :
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Multiple Choice Questions (MCQs)>Q 70
Which of the following statement is always correct ?
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Questions Based on High Order Thinking Skills (HOTS)>Q 71
From the symbol P1531, state mass number of phosphorus. (Give the answer in numerals)
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Questions Based on High Order Thinking Skills (HOTS)>Q 71
From the symbol P1531, state atomic number of phosphorus. (Give the answer in numerals)