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Question
State the chemical symbols for the following elements :
Sodium, Potassium, Iron, Copper, Mercury, Silver.
Solution
Following are the chemical symbols of the listed elements:
- Sodium: Na
- Potassium: K
- Iron: Fe
- Copper: Cu
- Mercury: Hg
- Silver: Ag
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RELATED QUESTIONS
Match the following:
| Column A | Column B |
| (a) Pb(NO3)2 | (i) rotten eggs smell |
| (b) CO2 | (ii) burns with a pop sound |
| (c) (NH4)2Cr2O7 | (iii) the suffocating smell of sulphur |
| (d) HCI | (iv) lime water turns milky |
| (e) NO2 | (v) crackling sound |
| (f) O2 | (vi) residue swells up |
| (g) H2 | (vii) brown gas |
| (i) H2S | (viii) supports combustion |
| (j) SO2 | (ix) fumes with NH3 solution |
What is a chemical formula? What is the significance of a formula?give an example to illustrate?
Write the formula of the following compound:
Potassium hydroxide
Write the formula of the following compound:
Sodium chloride
Write the formula of the following compound:
Sodium nitrite
Write the formula of the following compound:
Iron [II] chloride
Write the formula of the following compound:
Iron [III] oxide
Write the molecular formulae for the following compounds
Aluminium (III) nitrate
Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (You may use appendix-III).
- Ammonia
- Carbon monoxide
- (Hydrogen chloride
- Aluminium fluoride
- Magnesium sulphide
