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प्रश्न
Atomic number : ______ :: Mass number : Number of protons and neutrons.
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उत्तर
Atomic number: Number of protons:: Mass number: Number of protons and neutrons.
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संबंधित प्रश्न
Write true or false for the following statement
An atom on the whole has a positive charge.
TRUE \ FALSE
After the emission of a beta-particle, the atomic number of the atom increases by one.
Fill in the blank of the following statement :
All the mass of an atom is concentrated in a small region of space called the ___________.
Draw the orbital diagram of `""_20^40"Ca"^(2+)` ion and state the number of three fundamental particles present in it.
Give reason
Actual atomic mass is greater than mass number.
What is meant by the 'atomic number of an element'?
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element which can form trivalent ion
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What is common salt? Name the elements present in it. Write the formula of common salt. What are the atomic number and the mass number of the elements? Write the ions in the compound.
Match the following:
| Column A | Column B | ||
| 1. | Mass of proton | a. | +1 |
| 2. | Mass of electron | b. | -1 |
| 3. | Charge of electron | c. | 9.31 x 10-28g |
| 4. | Charge of proton | d. | 1.67 x 10-24g |
