Advertisements
Advertisements
प्रश्न
What do the following symbol stand for?
2H
उत्तर
2H stands for 2 atoms of hydrogen element
APPEARS IN
संबंधित प्रश्न
Define: Elements-
Write the full form of IUPAC. Name the elements represented by the following symbols:
Au, Pb, Sn, Hg
Give two examples of the following:
Solid + Liquid mixture
Match the formulas of the following gases with their correct names :
Gases - (a) H2 (b) N2 (c) O2 (d) Cl2 (e) HCI (f) NH3 (g) CO (h) CO2 (i) SO2 (j) NO (k) NO2.
Names:
(1) Ammonia (2) Nitrogen Dioxide (3) Oxygen (4) Hydrogen (5) Nitrogen (6) Chlorine (7) Carbon Monoxide (8) Sulphur Dioxide (9) Nitrogen Monoxide (10) Carbon Dioxide (11) Hydrogen Chloride
Write the radical of the following valency:
Hydroxide
Give the formula of the following gas:
Nitrous oxide
Define the term ‘valency’.
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Mercury
write symbol with the variable valency
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).
Sulphide
In the same way in chemistry, each element is denoted by a ______.
