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प्रश्न
Fill in the blank
A charged particle is called an _____
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उत्तर
A charged particle is called an ion
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संबंधित प्रश्न
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
Write the names of the elements present in the:-
Ammonia
Name three non-metals/radicals which have valency -1, -2, and -3.
What does the word ‘atom’ mean?
Fill in the blank
A deficiency of electrons produces a ________ charge.
Name the three subatomic particles present in an atom.
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?
An atom of an element X may be written as `""_9^4"X"`
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) What is the number of electrons in atom X?
(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
In what respects do the three isotopes of hydrogen differ? Give their structures.
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.
A compound containing one atom of carbon and two atoms of oxygen is ______.
Define the following term with an example.
Metal
Define the following term with an example.
Metalloid
Which of the following statements made by Dalton has not undergone any change?
The volume occupied by 4.4 g of CO2 at S.T.P ______
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
Write any two observations which support the fact that atoms are divisible.
What are the 3 most abundant atoms on the earth?
