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प्रश्न
Fill in the blank
If an atom gains an electron, it is called an _______
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उत्तर
If an atom gains an electron, it is called an anion
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संबंधित प्रश्न
Why is it not possible to see an atom with naked eyes?
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
Define:- Radicals
Fill in the blank
An ion with positive charge is called ______
What does an atom consist of ? Explain.
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is such a particle called ?
Why is it not possible to see an atom even with the most powerful microscope ?
One nm is equal to :
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.
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.
Define the following term:
Atom
Draw the electron dot structure of this compound.
Draw the diagrams representing the atomic structures of the following: Neon
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
K: Potassium:: C: ______.
Define the term ions or radicals.
The volume occupied by 4.4 g of CO2 at S.T.P ______
Does the solubility of a substance change with temperature? Explain with the help of an example.
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.
