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When does the nucleus of an atom tend to...

When does the nucleus of an atom tend to be radioactive ?

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When the nucleous is unstable i.e., the neutron- proton ratio is greater than unity.
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ICSE-SAMPLE QUESTION PAPER 5 -SECTION B
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  4. Name the factor that determines : Quality of the note.

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  5. Name the factor that determines : Pitch of the note.

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  9. The diagram in Fig. shows the displacement time graph of a vibrating b...

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  10. The diagram in Fig. shows the displacement time graph of a vibrating b...

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  11. The diagram in Fig. shows the displacement time graph of a vibrating b...

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  12. Two sets A and B, of three bulbs each, are glowing in two separate roo...

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  13. Why do we prefer arrangements of set B for house circuit?

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  14. A lens forms an upright and diminished image of an object when the obj...

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  15. A lens forms an upright and diminished image of an object when the obj...

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  16. What is the function of a fuse?

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  17. Name the principle on which fuse works.

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  18. To Which wire does the fuse is connected?

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  19. A type of electromagnetic wave has wavelength 50 Å. Name the wave.

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  20. A type of electromagnetic wave has wavelength 50 Å. What is the spee...

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