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प्रश्न
State the type of element for the following:
potassium
विकल्प
Metal
Non-metal
Metalloid
Noble gas
उत्तर
Metal
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संबंधित प्रश्न
How are the elements with variable valency named? Explain with an example.
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it
Chloride
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
Ca2+ NO31-
Match the formulas of the following of acids with their correct names:
Acids – (a) HCI (b) HNO3 (c) H2SO4 (d) H2CO3
Names – (1) Carbonic acid (2) Sulphuric acid (3) Hydrochloric acid (4) Nitric acid
State the type of element for the following:
Lead
Write the radical of the following valency:
Nitrate
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Iron
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).
Nitrate
Name three metals whose symbols are derived: from their Latin names.
Write the symbols for the following elements.
- Oxygen
- Gold
- Calcium
- Cadmium
- Iron
