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प्रश्न
Define: An Atom:
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 :-
Sulphuric acid
Fill in the blank:
Atoms are _____
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
Write electronic configuration of oxygen, fluorine, sodium, silicon, argon.
An atom has 13 protons and 14 neutrons.
What is the atomic number of the atom ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the charge on the particle ?
Fill in the blank
If an atom gains an electron, it is called an _______
What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?
Write the relation between nanometre and metre.
Find the mass of 2 moles of nitrogen atoms.
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
Name the gas that.
Turns moist starch iodide paper blue black.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
Define the following term with an example.
Element
The smaller particles found in the atom is called ______.
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
Draw the structure of an atom and explain the position of the sub-atomic particles.
Define the following term with an example.
Metal
