ICSE Class 7 Answered
Expert Answer
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- Elements and their Symbols are as follows:
The Modern symbols of elements are derived from their English or Latin names which is made up of either first letter or first and second letter or the first letter and letter appearing later in the name.
|
Name of Element |
Symbol |
Latin Name |
Name of Element |
Symbol |
Latin Name |
|
Hydrogen |
H |
— |
Nickel |
Ni |
— |
|
Oxygen |
O |
— |
Manganese |
Mn |
— |
|
Boron |
B |
— |
Calcium |
Ca |
— |
|
Carbon |
C |
— |
Chlorine |
Cl |
— |
|
Fluorine |
F |
— |
Bromine |
Br |
— |
|
Iodine |
I |
— |
Chromium |
Cr |
— |
|
Nitrogen |
N |
— |
Cobalt |
Co |
— |
|
Phosphorus |
P |
— |
Lead |
Pb |
Plumbum |
|
Sulphur |
S |
— |
Mercury |
Hg |
Hydrargyrum |
|
Barium |
Ba |
— |
Phosphorus |
P |
— |
|
Iron |
Fe |
Ferrum |
Sodium |
Na |
Natrium |
|
Gold |
Au |
Aurum |
Potassium |
K |
Kalium |
|
Silver |
Ag |
Argentum |
Tin |
Sn |
Stannum |
|
Tungsten |
W |
Wolfram (German name) |
Uranium |
U |
— |
|
Lithium |
Li |
— |
Zinc |
Zn |
— |
- Name of the few compounds and their Formulae are as follows:
|
Name |
Chemical Formula |
|
Hydrogen |
H2 |
|
Nitrogen |
N2 |
|
Oxygen |
O2 |
|
Chlorine |
Cl2 |
|
Hydrogen chloride |
HCl |
|
Carbon monoxide |
CO |
|
Nitrogen monoxide |
NO |
|
Carbon dioxide |
CO2 |
|
Nitrogen dioxide |
NO2 |
|
Dinitrogen oxide |
N2O |
|
Sulphur dioxide |
SO2 |
|
Sulphuric acid |
H2SO4 |
|
Carbonic acid |
H2CO3 |
|
Phosphoric acid |
H3PO4 |
|
Potassium hydroxide |
KOH |
|
Sodium hydroxide |
NaOH |
|
Calcium hydroxide |
Ca(OH) 2 |
|
Copper sulphate |
CuSO4 |
|
Sodium chloride |
NaCl |
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