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प्रश्न
Name the particles which revolve around the nucleus.
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उत्तर
Electron.
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Elements combine in definite proportions to form compounds.
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Define:- Atom
Write the names of `"Ca"("NO"_3)_2` compounds :
Write the names of `"FeS"` compounds :
Who originated the word ‘atom’ ?
Name the particle or particles you would expect to find in :
The nucleus of an atom
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
How is the size of an atom indicated ?
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
How many atoms are there in exactly 12 g of carbon-12 element ? (C = 12 u)
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will lose electron?
A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –
- ammonium
- bisulphate
- carbonate
state the group of atoms present in each radical.
The basic unit of matter is ______.
Define the following term with an example.
Compound
Define the following term with an example.
Metal
Define the following term with an example.
Metalloid
The graphite refill used is pencil is made of element called ______.
