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प्रश्न
Sulphur has an atomic number 16 and a mass of 32.
State the number of protons and neutrons in the nucleus of sulphur. Give a simple diagram to show the arrangement of electrons in an atom of sulphur.
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उत्तर
Atomic number = 16
Atomic mass = 32
Number of protons = 16
Number of electrons = 16
Number of neutrons = 32 - 16 = 16
Electronic configuration = 2, 8, 6
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संबंधित प्रश्न
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?
Fill in the blanks- The number of protons in the nucleus of an atom is called its ....................
(a) What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.
(b) What is the relation between the atomic number and mass number of an element?
(c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
If an atom ‘A’ has atomic number 19 and mass number 39, state –
- Its electronic configuration.
- The number of valence electrons it possesses.
Draw the atomic diagram of the following element showing the distribution of – protons, neutrons and the electrons in the various shell of the atom.
Carbon – \[\ce{^12_6C}\]
[The upper number represent the – mass number and the lower number represent the – atomic number e.g. calcium – mass number = 40, atomic number = 20]
Differentiate between the following term:
Atomic number and mass number
The Atomic number of an element is 20. It has ______ valence electrons.
A ______ number describes a specific aspect of an electron.
Mass No. 27 is for the element ______.
An element has 2 electrons in its N shell.
- What is its atomic number?
- State its position in the periodic table.
- Is it a metal or a non-metal?
- State the name assigned to this group.
- What is the valency of this element?
