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प्रश्न
Define: Ions
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उत्तर
An atom which becomes charged by losing or gaining electrons is called an ion.
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संबंधित प्रश्न
Write the names of the elements present in the:-
Ammonia
Name the particles which revolve around the nucleus.
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’ ?
Define: An Atom:
The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell of the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
In what respects do the three isotopes of hydrogen differ? Give their structures.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
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.
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 smallest particle of matter that can exist by itself is ______.
In all atoms of an element
Give the salient features of “Modern atomic theory”.
Which of the following has maximum number of atoms?
Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order
- Rutherford’s atomic model
- Thomson’s atomic model
- Bohr’s atomic model
The graphite refill used is pencil is made of element called ______.
