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प्रश्न
Indicate whether the following statement is true or false:
Molecules combine to form atoms
पर्याय
True
False
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उत्तर
False
Correct Statement: Atoms combine to form a molecule.
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संबंधित प्रश्न
Write true or false
All pure substances have characteristic melting and boiling points.
Name: a Non-metal Which is a Good Conductor of Electricity.
Fill in the blank
_________ refers to the number of atoms in the molecule of an element
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – two coloured gases (with their colours)
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 blank with the correct word.
From the elements nitrogen, chlorine, bromine, the element present in the atmosphere is ________.
Select the correct answer to the statement given below:
A non-metal which exists in the liquid state.
Select the correct answer from A, B, C, D & E for the statement given below :
A mixture consisting of elements & a compound.
Differentiate metals and non-metals.
Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an element or compound?
