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प्रश्न
Write the full form of IUPAC.
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उत्तर
The full form of IUPAC is International Union of Pure and Applied Chemistry.
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संबंधित प्रश्न
Why is it not possible to see an atom with naked eyes?
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
Define:- Molecule
Write the names of the elements present in the:-
Acetic acid
Fill in the blank:
Atoms are _____
Define: Chemical bond
Define: Relative atomic mass
Fill in the blank
If an atom loses an electron, it acquires ______ a charge.
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
Find the mass of 2 moles of nitrogen atoms.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
The volume occupied by 4.4 g of CO2 at S.T.P ______
A change in the physical state can be brought about
What is the fundamental particle of an element?
Atoms have a radius of the order ______.
