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प्रश्न
Dalton said that ______ could not be divided.
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उत्तर
Dalton said that atoms could not be divided.
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संबंधित प्रश्न
Explain the Atomic number with example.
The composition of the nuclei of two atomic species X and Y are given as under
| X | Y | |
| Protons | 6 | 6 |
| Neutrons | 6 | 8 |
Give the mass numbers of X and Y. What is the relation between the two species?
Write true or false for the following statement
An atom on the whole has a positive charge.
Multiple Choice Questions
The sub atomic particle with negative charge is
The atomic number and the mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement.
From the symbol `""_2^4"He"` for the element helium, write down the mass number and the atomic number of the element.
State why the atomic weight of an element is also termed relative atomic mass.
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Carbon [At. no. = 6, Mass no. = 12]
Atomic number : ______ :: Mass number : Number of protons and neutrons.
Which of the following are true for an element?
- Atomic number = number of protons + number of electrons
- Mass number = number of protons + number of neutrons
- Atomic mass = number of protons = number of neutrons
- Atomic number = number of protons = number of electrons
