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

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Calcium is a monovalent element.

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Important Questions on Atomic Structure

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

The _____ of an element is the combining capacity of an atom of the element.

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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 3

A proton has _____ charge. (positive/negative)

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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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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

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FRANK NEW CERTIFICATE - Chemistry>Chapter 5 - Atomic Structure>EVALUATION>Write the formulae and the valencies of the following radicals

Write the formulae and the valencies of the following radicals.

Ammonium, Nitrate, Chloride, Sulphate, Hydroxide, Phosphate, Sulphide

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

Name the following compounds.

${CH}_{4}, NaCl, NaOH, {CaCO}_{3}, {Na}_{2} {SO}_{4}, {CO}_{2}, {SiO}_{2}, C_{6} H_{12} O_{6}, {NH}_{3}$

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

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