State Which Element Exists in the Highest Percentage in Earth’S Crust. - Chemistry

State which element exists in the highest percentage in earth’s crust.

One Line Answer

Oxygen (O) – 46.1%

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Chapter 3 Elements, Compounds and Mixtures
Exercise | Q 2.1

The symbols of the elements cobalt, aluminium, helium and sodium respectively written by a student are as
follows. Which symbol is the correct one ?

Two elements X and Y have valencies of 5 and 3, and 3 and 2, respectively. The elements X and Y are most likely to be respectively :

What do the following symbol stand for?

2H

The formula of the sulphate of an element M is M₂(SO₄)₃Write the formula of it

Chloride

Match the symbols of non-metallic elements with their correct combining power or capacity.

(a) O
(b) S
(c) Cl

Combining power or capacity A : 3; B : 2; C : 1. (negative valencies)

Give the symbol of the following element:

Radon

Write the chemical formula of the following:

magnesium oxide

Give the formula of the following gas:

Sulphur dioxide

What does the symbol '(l)' present in a chemical equation, mean?

Which of the following symbols of elements are incorrect? Give their correct symbols