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प्रश्न
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
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उत्तर
In water, the ratio of oxygen to hydrogen is 8:1 by mass.
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संबंधित प्रश्न
If bromine atom is available in the form of, say, two isotopes `""_35^79Br (49.7%)" and """_35^81Br (50.3%)`, calculate the average atomic mass of bromine atom.
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What is such a particle called ?
Write the relation between nanometre and metre.
An atom of an element X may be written as `""_9^4"X"`
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(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
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(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.
Which of the following statement is correct about the atom of an element ?
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- Nucleus
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Elements contain two or more kind of atoms and compounds contain only one kind of atom.
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Define the following term with an example.
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Define the following term with an example.
Metalloid
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