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प्रश्न
Mention three gaseous elements and write their molecular formulae
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उत्तर
| Three gaseous elements | molecular formulae. | Atoms in one Molecule |
| Hydrogen | H2 | 2 |
| Oxygen | O2 | 2 |
| Chlorine | Cl2 | 2 |
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संबंधित प्रश्न
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Sand
Give the symbols of: Carbon, calcium, copper, chlorine, cobalt, argon.
Tick (√) the correct alternative from the choice given for the following statement.
The compound used as common salt is
Tick (√) the correct alternative from the choice given for the following statement
A gaseous non-metal.
Complete the statement with the correct words.
_______ are chemicals which are hydroxide (or oxides) of ______ eg. sodium hydroxide.
Write the names of elements from the following symbol:
Cd
Elements are broadly classified into metals and non-metals. State six general differences in the physical properties of metals and non-metals. State two metals and two non-metals which contradict with the general physical properties – giving reasons. State one difference in property between metalloids and noble gases.
State five different characteristics of compounds.
Give an example for the elements derived from their Latin names.
Match the following.
| 1. | Element | Made up of molecules |
| 2. | Compound | Impure substance |
| 3. | Colloid | Settles down on standing |
| 4. | Suspension | Pure substance |
| 5. | Mixture | Made up of atoms |
