Elements in our Earth's crust: Element % by weight Oxygen 46.6 Silicon 27.7 Aluminium 8.1 Iron 5.0 Calcium 3.6 Sodium 2.8 Potassium 2.6 Magnesium 2.1 Others 1.5 Which is the second most abundant element in the earth's crust? Name some ores of that element?

Silicon is the second most abundant element in the earth's crust. More than 90 % of the Earth's crust is composed of silicate minerals, making silicon the second most abundant element in the Earth's crust after oxygen. Quartz, rock and sand are some ores of silicon.

Elements in our Earth's crust: Element % by weight Oxygen 46.6 Silicon 27.7 Aluminium 8.1 Iron 5.0 Calcium 3.6 Sodium 2.8 Potassium 2.6 Magnesium 2.1 Others 1.5 Bauxite is the ore of which of the above mentioned elements?

Bauxite is the ore of aluminium. It is composed of a mixture of hydrous aluminium oxides. Note: Bauxite, the most important ore of aluminium, contains only 30–54% aluminium oxide, (alumina), Al 2 O 3 , the rest being a mixture of silica, various iron oxides, and titanium dioxide. The aluminium oxide must be purified before it can be refined to aluminium metal.

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Archana Shukla Solutions for Chapter: Elements, Compounds and Chemical Equations, Exercise 2: Assess

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Archana Shukla Science Solutions for Exercise - Archana Shukla Solutions for Chapter: Elements, Compounds and Chemical Equations, Exercise 2: Assess

Attempt the free practice questions on Chapter 6: Elements, Compounds and Chemical Equations, Exercise 2: Assess with hints and solutions to strengthen your understanding. WOW! SCIENCE Hands-on Learning in SCIENCE 7 solutions are prepared by Experienced Embibe Experts.