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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement
The hardest naturally occurring substance
विकल्प
Oxygen
Diamond
Zinc
Graphite
Gold
उत्तर
Diamond
APPEARS IN
संबंधित प्रश्न
Give Two Examples for Each of the Following: Non-metals
State four differences between compounds and mixtures.
Give two examples of the following.
Inert gases
Give reason: Graphite is used to make a lead of the pencils.
Tick (√) the correct alternative from the choice given for the following statement.
The most abundant elements in the universe are
Elements are classified into – Metals – Non-metals – Metalloids – Noble gases. State which of A, B, C, D is a –
1. Metallic element
2. Non-metallic element
3. Metalloid
4. Noble gas.
A: Is non-malleable, non-ductile & a poor conductor of electricity ___________
B: Has lustre, is malleable and ductile & a good conductor of heat ___________
C: Is unreactive and inert and present in traces in the air _________
D: Shows properties of both metals and non-metals ___________
Complete the statement given below by filling in the blanks with the correct words.
Atom contains ________ , with positively charged _____.
Write the names of elements from the following symbol:
Fe
Why are utensils made up of aluminium and brass?
Name the element which is used in toothpaste to strengthen our teeth.
