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प्रश्न
State what is meant by the term chemical formula.
उत्तर
Chemical formula is the representation of a substance by means of symbols.
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संबंधित प्रश्न
How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change.
The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is:
(a) P
(b) Q
(c) R
(d) S
What is the number of valence electrons in the atoms of first elements in a period?
How do the atomic radii of elements change as we go from left to right in a period of the periodic table?
(b) What is the number of elements is 3rd period, the modern periodic table?
Name the cation and the anion in the salt – calcium sulphate
Give the symbol and valency of the following element and radical.
Zinc
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
State the number of elements in Period 1 of the Periodic Table.
Find the odd one out and give its explanation.
