Advertisements
Advertisements
प्रश्न
Describe the different ways in which we can write the symbols of elements. Give appropriate examples.
उत्तर
The following rules are followed while assigning symbol to an elements:
- Chemical symbols usually consist of one or two letters.
- The symbols of most elements correspond to the first letter (which is capitalized) of their English name. For example, the symbol for oxygen is “O” and that for hydrogen is “H”.
- When there is more than one element that begins with the same letter, their symbols take two letters.
- The first letter is capitalised while the second letter has a lower case.
- For example, the names of both hydrogen and helium begin with H. So, hydrogen is represented by the symbol H and Helium by He.
| Element | Symbol |
| Hydrogen | H |
| Fluorine | F |
| Aluminimum | Al |
| Argon | Ar |
| Phosphorus | P |
| Sulphur | S |
| Chromium | CrCo |
| Cobalt |
APPEARS IN
संबंधित प्रश्न
Fill in the blank:
Dalton used symbol _____ for oxygen and _____ for hydrogen.
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.
Give the symbol of the following element:
Fluorine
State the type of element for the following:
Oxygen
Give the symbol of the following element:
Hydroxide
Give the formula of the following acid:
Carbonic
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
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).
Sulphite
The pictorial symbol for water given by the alchemists was
