Write a difference between the following pair as per the specified parameter . [10]
i) Calcium atom and Calcium ion [number of valence electrons]. ii) H and H2 [ number of atoms]
iii) Nitrate ion and Nitride ion. [symbol]
iv) SO3 and SO3-2 [name]
v) Sulphur and Sodium . [nature of element]
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1. The electronic configuration of Calcium is -2, 8, 8, 2. There are two valence electrons of Calcium.
2. Each hydrogen molecule in hydrogen gas consists of two hydrogen atoms bonded together. Likewise, two oxygen atoms bind to make a oxygen molecule.
4. SO3 is sulfate trioxide & SO3 -2 is called the sulfite ion
5. Sulfur (S), also spelled sulphur . Pure sulfur is a tasteless, odourless, brittle solid that is pale yellow in colour, a poor conductor of electricity, and insoluble in water.
Sodium reacts quickly with water, and also with snow and ice, to produce sodium hydroxide and hydrogen.
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