Advertisements
Advertisements
प्रश्न
State which element exists in the highest percentage in earth’s crust.
Advertisements
उत्तर
Oxygen (O) – 46.1%
APPEARS IN
संबंधित प्रश्न
Write true or false
Milk is an emulsion.
The scientist who proposed the first letter (or first letter and another letter) of the Latin or English name of
an element as its symbol, was :
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it
Oxide
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 |
Select the correct answer from the choice given below.
The type of element-phosphorus
Give the symbol of the following element:
Carbon
Write the chemical formula of the following:
magnesium oxide
Give the formula of the following gas:
Ammonia
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).
Hydroxide
What does the symbol '(g)' present in a chemical equation, mean?
