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प्रश्न
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
पर्याय
Molecule
Orbits
Atom
Valency
Radical
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उत्तर
Molecule
APPEARS IN
संबंधित प्रश्न
MATCH THE COLUMNAS
| 1. Jpham Dalton | a. Neutrons |
| 2. Atom | b. Model of the atom |
| 3. Chadwick | c.The atomic theory of matter |
| 4. Rutherfrod | d. Positively charged |
| 5. Protons | e. Electricity neutral |
| 6. Nuclear fusion | f. Generator of electricity |
| 7.Gamma -rays | g. High penetrating power |
| h.Energy in sun |
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
ANSWER IN DETAIL
Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?
ANSWER IN DETAIL
How are isobars different from isotopes ?
Define:- Radicals
Write the names of the elements present in the:-
Glucose
Write the names of `"Na"_3"PO"_4` compounds :
An atom has 13 protons and 14 neutrons.
What is the atomic number of the atom ?
An atom has 13 protons and 14 neutrons.
How many electrons would be present in this atom ?
Write the full form of IUPAC.
How is the size of an atom indicated ?
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
Deduce from the datum provided.
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number |
| \[\ce{_6^14C}\] | Mass number |
| \[\ce{_17^37 Cl}\] | Proton number |
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.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
The smallest particle of matter that can exist by itself is ______.
Define the following term with an example.
Non-metal
Atoms of different elements having the same number of ______ are called isotones.
The smallest unit of an element is ______.
