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प्रश्न
Name the particles which revolve around the nucleus.
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उत्तर
Electron.
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 |
What does an atom consist of ? Explain.
Define: Covalent bond
Write electronic configuration of oxygen, fluorine, sodium, silicon, argon.
Define: An Atom:
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
Does the particle have an excess of electrons or a deficiency of electrons ?
Fill in the blank
An _______ is electrically neutral.
What is an atom ? How do atoms usually exist ?
How many atoms are there in exactly 12 g of carbon-12 element ? (C = 12 u)
The electron shell ______ is nearest to the nucleus.
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 electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
Define the following term with an example.
Element
Draw the structure of an atom and explain the position of the sub-atomic particles.
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
Does the solubility of a substance change with temperature? Explain with the help of an example.
The graphite refill used is pencil is made of element called ______.
What are the 3 most abundant atoms on the earth?
The first scientific theory about atoms was given by J J. Thomson.
