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Which one of the following is present in the largest amount in terms of per cent by mass in the earth's crust?

A. Silicon

B. Oxygen

C. Carbon

D. Calcium

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  5. A mixture of ethyl alcohol and water can be separated by
  6. The non-metal which has a shining appearance is
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  8. The compound or nitrogen used in dry cells is
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  11. Which one of the following gases is extremely soluble in water?
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  17. Iron is rendered passive by
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  19. Annealing of glass is done in
  20. Nylon is made from
  21. Marble is
  22. The neutron was discovered by
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  24. Ozone occurs in the upper layers of air in the atmosphere because
  25. White lead is
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