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Question
Which of the following symbols of elements are incorrect? Give their correct symbols
- Cobalt CO
- Carbon c
- Aluminium AL
- Helium He
- Sodium So
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Solution
- Cobalt – Co
- Carbon – c
- Aluminium – A1
- Helium – He (correct)
- Sodium – Na
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RELATED QUESTIONS
The scientist who proposed the first letter (or first letter and another letter) of the Latin or English name of
an element as its symbol, was :
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 |
State what a chemical formula denotes.
Match the symbols of metallic elements – with their correct combining power or capacity.
(a) K
(b) Zn
(c) Al
(d) Na
(e) Ca
Combining power or capacity – A : 3 ; B : 2 ; C : 1. (positive valencies)
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Na1+ Cl1-
State the type of element for the following:
Lead
Give the formula of the following acid:
Sulphuric
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Give the qualitative and quantitative meaning of the term ‘symbol’.
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