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प्रश्न
What are the building blocks of matter ?
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उत्तर
Atoms and molecules are the building blocks of matter.
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संबंधित प्रश्न
Write the names of the elements present in the:-
Glucose
Write the names of the elements present in the:-
Sodium hydroxide
Fill in the blank
An ion with negative charge is called _______
Name three non-metals/radicals which have valency -1, -2, and -3.
Fill in the blank
A deficiency of electrons produces a ________ charge.
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
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?
Which of the following statement is correct about the atom of an element ?
Deduce from the datum provided.
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number |
| \[\ce{_6^14C}\] | Mass number |
| \[\ce{_17^37 Cl}\] | Proton number |
Name the gas that.
Turns moist starch iodide paper blue black.
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.
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
Define – Atom.
In the nucleus of `""_20"Ca"^40`, there are ______
Atoms of different elements having the same number of ______ are called isotones.
Give the salient features of “Modern atomic theory”.
The graphite refill used is pencil is made of element called ______.
The smallest unit of an element is ______.
The most abundant type of atom is the universe is ______.
The first scientific theory about atoms was given by J J. Thomson.
