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प्रश्न
Write true or false for the following statement
An atom on the whole has a positive charge.
विकल्प
True
False
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उत्तर
false
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संबंधित प्रश्न
Dalton said that ______ could not be divided.
(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?
From the symbol `""_15^31"P"`, state : atomic number of phosphorus
An element A atomic number 7 mass numbers 14
B electronic configuration 2,8,8
C electrons 13, neutrons 14
D Protons 18 neutrons 22
E Electronic configuration 2,8,8,1
State Valency of each element
An element A atomic number 7 mass numbers 14
B electronic configuration 2,8,8
C electrons 13, neutrons 14
D Protons 18 neutrons 22
E Electronic configuration 2,8,8,1
State (i) Valency of each element (ii) which one is a metal (iii) which is non-metal (iv) which is an inert gas
Name or state the following:
Elements having same mass number but different atomic number
When an atom gives electrons from its outermost shell, it becomes ______ charged.
The elementary particles such as protons and neutrons are collectively called ______.
Electrons revolve around the nucleus in definite open shells.
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 |
If element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
