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प्रश्न
State Dalton’s atomic theory.
उत्तर
- Matter is made up of tiny particles called atoms
- Atoms are indivisible.
- Atom can be neither be created nor destroyed.
- Atoms of same element are identical in mass and properties
- Atoms of different elements differ in mass and properties
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संबंधित प्रश्न
TRUE \ FALSE
Elements combine in definite proportions to form compounds.
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
Write the names of the elements present in the:-
Glucose
Write the names of `"Na"_3"PO"_4` compounds :
Name three non-metals/radicals which have valency -1, -2, and -3.
Who originated the word ‘atom’ ?
How did Neils Bohr visualise the atom ?
Fill in the blank
A charged particle is called an _____
How many times is a proton heavier than an electron?
What is an atom ? How do atoms usually exist ?
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Define the following term:
Atom
Deduce from the datum provided.
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number |
| \[\ce{_6^14C}\] | Mass number |
| \[\ce{_17^37 Cl}\] | Proton number |
The smallest particle of matter that can exist by itself is ______.
State true or false. If false, correct the statement.
An atom is electrically neutral.
Define – Atom.
Define the following term with an example.
Metalloid
1 mole of Gold and Silver contain same number of atoms.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
Lead is also known as plumbum.
