HARD
Earn 100

Directions: Read the following paragraph and the figure given alongside to answer the following questions.

In radioactive decay, a nucleus decays into components. The atomic mass of the nucleus must be equal to the sum of the atomic masses of the components. Also, the atomic number of the nucleus must be equal to the sum of the atomic numbers of the components. A component of decay may be a beta particle that has an atomic number - 1 and atomic mass 0 (zero). The particle is denoted as Ceo), where the subscript refers to the atomic number and the superscript refers to the atomic mass. Another example of a decay particle is an alpha particle which is denoted as 2He4 . The graph given here represents a nucleus (a) undergoing many stages of decay.

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The scheme indicates that a stable nucleus may be formed which has a mass of:

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Important Questions on Learning

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When you are not capable of taking a decision, then whose suggestion or advice you would like to take?
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Teachers and parents should be in close contact to develop students:
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Complicated problems ______.
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A suitable approach to introduce co-ordinate geometry in class IX is through the use of:
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If all the children have the same problem, then you solve their problem by _____.
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Peer Support Programme becomes instrumental in_____.
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Problem solving is a process of:
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Fill in the blanks.

The committee ____________ of all the changes in the report.

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Language acquisition can be automatically attained - this is favoured by:
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Problem-solving method is:
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Which one of the following is not a Problem-solving strategy in Mathematics?
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Teachers' code of conduct is ____.

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While deciding upon rewards, care should be taken to:
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In the context of Indian society, teaching is more than a challenge because:

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Punishment is a _____.
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A reward to pupils helps them_____.
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Remedial teachers should co-ordinate with _____ to help pupils solve their problems.
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An important part of the teaching learning process is the curriculum. This curriculum should be prepared keeping in view the _____.

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Steps of learning does not include _____.
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In philosophy, different philosophies are studied _____.