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Question
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
Are isotopes atoms of the same element or different elements.
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Solution
Isotopes atoms are of the same element.
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Multiple Choice Questions
The sum of number of protons and number of neutrons present in the nucleus of an atom is called its
Name the particles which actually determine the mass of an atom.
What is the significance of atomic numbers in the modern Periodic Table?
Give reason
Actual atomic mass is greater than mass number.
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
If an isotope of ‘H’ has mass no. = 3, how many neutrons does it have.
Complete the following table.
| Atomic Number | Mass Number | Number of Neutrons | Number of Protons | Number of Electrons | Name of the Element |
| 9 | ______ | 10 | ______ | ______ | ______ |
| 16 | ______ | 16 | ______ | ______ | ______ |
| ______ | 24 | ______ | ______ | 12 | Magnesium |
| ______ | 2 | ______ | 1 | ______ | ______ |
| ______ | 1 | 0 | 1 | 1 | ______ |
What is a neutron?
Every atom has an equal number of protons and electrons. The nature of the atom is ______.
When an atom gives electrons from its outermost shell, it becomes ______ charged.
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 |
