Advertisements
Advertisements
Question
The radius of an oxygen atom is 0.073 nm. What does the symbol ‘nm’ represent ?
Advertisements
Solution
The symbol 'nm' in 0.073 nm (radius of an oxygen atom) represents the unit of atomic radius, i.e. nanometre.
APPEARS IN
RELATED QUESTIONS
An element Z has a valency of 3. What is the formula of oxide of Z ?
The formula of carbonate of a metal M is M2CO3.
What will be the formula of its nitride ?
Name the element in the compound and give the formula of the following compound:
Blue vitriol
Name the element in the compound and give the formula of the following compound:
Ethane
Write the formula of the following compound:
Calcium chloride
Write the formula of the following compound:
Tetra amine copper [II] sulphate
Write the formula of the following compound:
Lead [II] oxide
Write the chemical formula for the following elements.
- Hydrogen
- Nitrogen
- Ozone
- Sulphur
Write the molecular formulae for the following compounds
Copper (II) bromide
Complete the following crossword puzzle (Fig. 3.1) by using the name of the chemical elements. Use the data given in Table.
| Across | Down | ||
| 2 | The element used by Rutherford during his α–scattering experiment | 1 | A white lustrous metal used for making ornaments and which tends to get tarnished black in the presence of moist air |
| 3 | An element which forms rust on exposure to moist air | 4 | Both brass and bronze are alloys of the element |
| 5 | A very reactive non–metal stored under water | 6 | The metal which exists in the liquid state at room temperature |
| 6 | Zinc metal when treated with dilute hydrochloric acid produces a gas of this element which when tested with burning splinter produces a pop sound. | 8 | An element with symbol Pb |
