The valency of fluorine atom is

Important Questions on Atomic Structure and Chemical Bonding

EASY

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 4 - Atomic Structure and Chemical Bonding>EXAM PRACTICE>Q 27

Isotopes of an element have

EASY

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 4 - Atomic Structure and Chemical Bonding>EXAM PRACTICE>Q 28

Which of the following is not an isotope of hydrogen?

EASY

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 4 - Atomic Structure and Chemical Bonding>EXAM PRACTICE>Q 29

The bond formed between nitrogen atoms in a molecule is

EASY

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 4 - Atomic Structure and Chemical Bonding>EXAM PRACTICE>Q 33

Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order. Rutherford's atomic model, Thomson's atomic model, Bohr's atomic model.

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9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 4 - Atomic Structure and Chemical Bonding>EXAM PRACTICE>Q 34

Why did Rutherford select a gold foil in his $\mathrm{\alpha }$-ray scattering experiment?

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9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 4 - Atomic Structure and Chemical Bonding>EXAM PRACTICE>Q 35

If ${\mathrm{Mg}}^{2+}$ has $12$ protons and $12$ neutrons, what is its atomic number and mass number?

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9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 4 - Atomic Structure and Chemical Bonding>EXAM PRACTICE>Q 36

Which subatomic particles of an atom are responsible for mass number?

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9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 4 - Atomic Structure and Chemical Bonding>EXAM PRACTICE>Q 37

Calculate the number of neutrons present in the nucleus of an element $\mathrm{X}$, which is represented as ${}_{15}{}^{31}\mathrm{X}$