Advertisements
Advertisements
प्रश्न
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
Advertisements
उत्तर
Iron has variable valency 2 and 3
| \[\ce{Fe^{2+}}\] | \[\ce{Fe^{3+}}\] |
| Ferrous | Ferric |
OR
| \[\ce{Fe[II]}\] | \[\ce{Fe[III]}\] |
APPEARS IN
संबंधित प्रश्न
Write the symbols of helium, silver, krypton, antimony, barium.
Match the metallic elements – with their correct symbols Metallic elements
| Metallic elements | Symbol |
| (a) Potassium | (1) Ca |
| (b) Sodium | (2) Zn |
| (c) Calcium | (3) Pb |
| (d) Magnesium | (4) Hg |
| (e) Zinc | (5) Cu |
| (f) Aluminum | (6) Au |
| (g) Iron | (7) K |
| (h) Lead | (8) Fe |
| (i) Copper | (9) Al |
| (j) Mercury | (10) Na |
| (k) Silver | (11) Mg |
| (l) Platinum | (12) Pt |
| (m) Gold | (13) Ag |
For writing a chemical formula – ‘symbols’ and combining capacity of an element with hydrogen i.e. ‘valency’ should be known. Explain the term – combining the capacity of an element i.e. valency.
State which element exists in the highest percentage in earth’s crust.
Write the chemical formula of the following:
calcium carbonate
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).
Oxide
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).
Zincate
What does the symbol '(aq.)' present in a chemical equation, mean?
Write a note on Greem symbols.
Which letter is never used in any element symbol?
