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The metal that is usually extracted from sea water is

Ca
Na
K
Mg
Additional Questions

The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

Answer

The inert gases are ____ in water

Answer

The molecular formula of phosphorous is

Answer

The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of

Answer

The gas present in the stratosphere which filters out some of the suns ultraviolet light and provides an effective shield against radiation damage to living things is

Answer

The most commonly used bleaching agent is

Answer

The nucleus of a hydrogen atom consists of

Answer

The heat required to raise the temperature of body by 1 K is called

Answer

The nuclear particles which are assumed to hold the nucleons together are

Answer

The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is

Answer
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