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प्रश्न
Answer the following question:
Give the advantages of using symbols instead of names of elements or compounds.
उत्तर
1. Symbols increase scientific communication across the world.
2. Symbols help to make equations and data shorter and concise.
3. Symbols are helpful for Scientists as it would take time and paper to do their job.
They had to write out the full name of every element instead of its symbol
APPEARS IN
संबंधित प्रश्न
Correct the following statement:
CO and Co both represents cobalt.
State the number of atoms of each element, present in \[\ce{HNO3}\].
Also name the compound.
Name: Two substances used to make electric wires
Give one use of the following substance:
Iron
Answer the following question:
What do you understand by the statement: ‘metals are ductile and malleable’?
Find the atomicity of the Following molecule:
Carbon Monoxide
Fill in the blank
_________ refers to the number of atoms in the molecule of an element
Complete the statement given below by filling in the blanks with the correct words.
From the elements – He, Br, Pt, and O; the element which is metallic is ____, an inert element is ____, forms a triatomic molecule is ____, is liquid at room temperature is_ ___.
Match the compounds in List I – 1 to 20 with their correct formulas from in List II-A to T.
| List I | List II | ||
| 1 | Hydrochloric acid | A | NaCI |
| 2 | Potassium Hydroxide | B | NaOH |
| 3 | Sulphuric Acid | C | KCI |
| 4 | Zinc Hydroxide | D | Ca(OH)2 |
| 5 | Sodium Chloride | E | CaS |
| 6 | Nitric Acid | F | CuSO4 |
| 7 | Calcium Hydroxide | G | CaCO3 |
| 8 | Carbonic Acid | H | NH4CI |
| 9 | Sodium hydroxide | I | HCI |
| 10 | Copper sulphate | J | ZnO |
| 11 | Potassium Chloride | K | HNO3 |
| 12 | Calcium Carbonate | L | H2CO3 |
| 13 | Magnesium Sulphide | M | MgS |
| 14 | Zinc Sulphate | N | MgO |
| 15 | aluminium Hydroxide | O | KOH |
| 16 | Sodium Carbonate | P | ZnSO4 |
| 17 | Calcium Sulphide | Q | Na2CO3 |
| 18 | Magnesium Oxide | R | H2SO4 |
| 19 | Zinc Oxide | S | AI(OH)3 |
| 20 | Ammonium Chloride | T | Zn(OH)2 |
Select the correct answer to the statement given below:
The chemical name for dinitrogen oxide [N20].
