FRANK NEW CERTIFICATE - Chemistry>Chapter 5 - Atomic Structure>EVALUATION>Q 5

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7th ICSE

IMPORTANT

Earn 100

Calcium is a monovalent element.

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Important Questions on Atomic Structure

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7th ICSE

IMPORTANT

FRANK NEW CERTIFICATE - Chemistry>Chapter 5 - Atomic Structure>Connect>Q 2

Identify whether the given formula is of an element or a compound.

$H_{2} O_____$

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7th ICSE

IMPORTANT

FRANK NEW CERTIFICATE - Chemistry>Chapter 5 - Atomic Structure>Connect>Q 6

Identify whether the given formula is of an element or a compound.

$Fe$

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FRANK NEW CERTIFICATE - Chemistry>Chapter 5 - Atomic Structure>EVALUATION>Q 2

2 H

represents two _____ of hydrogen. (molecules/atoms)

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FRANK NEW CERTIFICATE - Chemistry>Chapter 5 - Atomic Structure>EVALUATION>Q 4

The valency of

{HCO}_{3}^{-}

is _____.

(1 / 2)

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7th ICSE

IMPORTANT

FRANK NEW CERTIFICATE - Chemistry>Chapter 5 - Atomic Structure>EVALUATION>Write the molecular formula of the following elements

Write the molecular formula of the following elements.

Helium, Oxygen, Hydrogen, Chlorine, Iodine, Ozone, Phosphorus, Sulphur

MEDIUM

7th ICSE

IMPORTANT

FRANK NEW CERTIFICATE - Chemistry>Chapter 5 - Atomic Structure>EVALUATION>Q 1

Distinguish between a molecule of an element and a molecule of a compound.

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7th ICSE

IMPORTANT

FRANK NEW CERTIFICATE - Chemistry>Chapter 5 - Atomic Structure>EVALUATION>Q 2

Define atomicity. Write the atomicity of hydrogen, ozone and sulphur.

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7th ICSE

IMPORTANT

FRANK NEW CERTIFICATE - Chemistry>Chapter 5 - Atomic Structure>EVALUATION>Q 4

What are radicals? Give two examples.