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प्रश्न
What is meant by the 'atomic number of an element'?
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उत्तर
An atomic number of an element is the number of protons in the nucleus of an atom.
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संबंधित प्रश्न
FILL IN THE BLANK
Rutherford won the Nobel Prize in 1908 for his investigations in the field of ......................
Fill in the blank of the following statement :
All the mass of an atom is concentrated in a small region of space called the ___________.
From the symbol `""_15^31"P"`, state : atomic number of phosphorus
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Match the atomic numbers 4,8,10,15 and 19 with each of the following:
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Atomic no. = 1
Mass no. = 1
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The atomic number and the mass number of an element is 26 and 56 respectively. Calculate the number of electrons, protons and neutrons in its atom. Draw the structure.
Mass No. 27 is for the element ______.
Match the following:
| Column A | Column B | ||
| 1. | K shell | a. | 8 |
| 2. | L shell | b. | 32 |
| 3. | M shell | c. | 2 |
| 4. | N shell | d. | 18 |
