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प्रश्न
What does an atom consist of ? Explain.
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उत्तर
An atom consists protons, electrons and neutrons. Protons are positively charged, electrons have negative charge while neutrons have no charge
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संबंधित प्रश्न
WRITE SHORT ANSWER
Name three inert gases.
Define: Ions
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
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 atomic numebr of X ?
Fill in the blank
A deficiency of electrons produces a ________ charge.
Name the unit in which the radius of an atom is usually expressed.
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
State two observations which show that atom is not indivisible.
Which of the following statement is correct about the atom of an element ?
A compound containing one atom of carbon and two atoms of oxygen is ______.
The smaller particles found in the atom is called ______.
State true or false. If false, correct the statement.
An atom is electrically neutral.
Define the following term with an example.
Compound
Define the following term with an example.
Metal
In the nucleus of `""_20"Ca"^40`, there are ______
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
Atoms of one element can be transmuted into atoms of other elements by ______
1 mole of Gold and Silver contain same number of atoms.
Dalton’s atomic theory successfully explained
(i) Law of conservation of mass
(ii) Law of constant composition
(iii) Law of radioactivity
(iv) Law of multiple proportions
