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प्रश्न
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is such a particle called ?
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उत्तर
What is such a particle called= anion
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संबंधित प्रश्न
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?
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.
WRITE SHORT ANSWER
Name three inert gases.
Write the names of `"FeS"` compounds :
State Dalton’s atomic theory.
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
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
A deficiency of electrons produces a ________ charge.
How many times is a proton heavier than an electron?
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
Which has more atoms, 50 g of aluminium or 50 g of iron ? Illustrate your answer with the help of calculations.
(Atomic masses : Al = 27 u ; Fe = 25 u)
Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
Select the correct answer to the statement given below:
Imaginary path around the nucleus of an atom in which electrons revolve.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of aluminium
The basic unit of matter is ______.
Define the following term with an example.
Metal
Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order
- Rutherford’s atomic model
- Thomson’s atomic model
- Bohr’s atomic model
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
