Advertisements
Advertisements
प्रश्न
There are ______ number of known elements.
Advertisements
उत्तर
There are 118 number of known elements.
APPEARS IN
संबंधित प्रश्न
Define: Formula
Name A substance used as an insulator.
Give one use of the following substance:
Brass
Indicate whether the following statement is true or false:
All elements are artificially prepared
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
Tick (√) the correct alternative from the choice given for the following statement.
Gold is used to make jewellery because
Who are my companions?
| Group 'A' | Group 'B' |
| 1. Stainless steel | (a) Non-metal |
| 2. Silver | (b) compound |
| 3. Bhajani mixture for milling | (c) Mixture |
| 4. Salt | (d) Element |
| 5. Coal | (e) Alloy |
| 6. Hydrogen | (f) Metal |
Write an answer to the following question in your own words.
Which elements (metals and non-metals), compounds and mixtures do we use in our day-to-day life?
Give a reason for the following statement:
Components in a mixture are present in varying proportions and not in a fixed proportion.
______ is a mixture of gases.
