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प्रश्न
Name the gas that.
Turns moist starch iodide paper blue black.
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उत्तर
Chlorine.
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संबंधित प्रश्न
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
WRITE SHORT ANSWER
What is radioactivity?
Give the charge and the mass of an electron, proton and neutron present in an atom ?
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An _______ is electrically neutral.
What value has been given to the mass of this reference atom ?
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(Atomic masses : Al = 27 u ; Fe = 25 u)
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
Electron, proton, neutron are the types of ______ in an atom.
State true or false. If false, correct the statement.
An atom is electrically neutral.
What are the 3 most abundant atoms on the earth?
