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प्रश्न
Define: An Atom:
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उत्तर
An Atom: Smallest particle of an element that can exist and have properties of an element.
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संबंधित प्रश्न
Write the names of the elements present in the:-
Acetic acid
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
Who originated the word ‘atom’ ?
Fill in the blank
If an atom gains an electron, it is called an _______
Fill in the blank
A charged particle is called an _____
Fill in the blank
An _______ is electrically neutral.
Fill in the blank
An excess of electrons produces a ________ charge.
An atom of element E contains 3 protons, 3 electrons and 4 neutrons :
(a) What is its atomic number?
(b) What is its mass number?
(c) Write the electronic configuration of the element E.
(d) State whether element E is a metal or non-metal. Why?
(e) What type of ion, cation or anion, will be formed by an atom of element E? Why
(f) Write the symbol of the ion formed by an atom of element E.
(g) What could element X be?
Define the following term:
Atom
Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –
- ammonium
- bisulphate
- carbonate
state the group of atoms present in each radical.
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
K: Potassium:: C: ______.
Name the sub-atomic particles.
Define the following term with an example.
Non-metal
Define the following term with an example.
Metalloid
The number of atoms present in a molecule is called its ______.
Write any two observations which support the fact that atoms are divisible.
The smallest unit of an element is ______.
