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प्रश्न
Write the radical of the following valency:
Carbonate
पर्याय
1+
2+
3+
1−
2−
3−
उत्तर
2−
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संबंधित प्रश्न
Give a reason why elements are tabulated in a table called the ‘Periodic table’.
Match the formulas of the following of bases with their correct names.
Bases – (a) NaOH (b) KOH (c) Ca(OH)2 (d) Zn(OH)2
Names – (1) Potassium hydroxide (2) Zinc hydroxide (3) Aluminium hydroxide (4) Calcium hydroxide (5) Sodium hydroxide
Give the symbol of the following element:
Arsenic
State the type of element for the following:
Fluorine
Give the symbol of the following element:
Nitrate
Give the formula of the following acid:
Hydrochloric
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
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Lead
write symbol with the variable valency
Define Alchemy.
Which of the following symbols of elements are incorrect? Give their correct symbols
- Cobalt CO
- Carbon c
- Aluminium AL
- Helium He
- Sodium So
