Advertisements
Advertisements
प्रश्न
Mass of one atom of oxygen is
पर्याय
`16/(6.023 xx 10^23)"g"`
`32/(6.23 xx 10^23) "g"`
`1/(6.023 xx 10^23)"g"`
8u
उत्तर
`16/(6.023 xx 10^23)"g"`
Mass of one atom of oxygen
= `"Atomic mass"/"N"`
`16/(6.023 xx 10^23)"g"`
APPEARS IN
संबंधित प्रश्न
Write the symbols of helium, silver, krypton, antimony, barium.
Select elements and compounds from the following list: Iron, plaster of paris, chalk, common salt, copper, aluminium, calcium oxide, cane sugar, carbon, silica, sodium sulphate, uranium, potassium carbonate, silver, carbon dioxide.
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
Magnetic separation
Match the non-metallic elements – with their correct symbols. Non-metallic elements are:
Non-Metallic elements | Symbol |
(a) Carbon | (1) O |
(b) Chlorine | (2) I |
(c) Oxygen | (3) Si |
(d) Phosphorus | (4) C |
(e) Hydrogen | (5) Cl |
(f) Nitrogen | (6) P |
(g) Iodine | (7) F |
(h) Bromine | (8) H |
(i) Fluorine | (9) S |
(j) Silicon | (10) Br |
(k) Sulphur | (11) N |
Give the symbol and the number of atoms of the following elements present in carbon dioxide.
Give the symbol of the following element:
Chlorine [chloride]
State the type of element for the following:
Fluorine
State the type of element for the following:
Boron
State the type of element for the following:
Copper
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Nitride