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प्रश्न
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
पर्याय
True
False
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उत्तर
False
Correct statement: The basic unit of an element is atom.
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
WRITE SHORT ANSWER
Define an ionic compound.
WRITE SHORT ANSWER
Name three inert gases.
ANSWER IN DETAIL
Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?
Define: Chemical bond
An atom has 13 protons and 14 neutrons.
How many electrons would be present in this atom ?
Fill in the blank
An _______ is electrically neutral.
State two observations which show that atom is not indivisible.
Which of the following statement is correct about the atom of an element ?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will gain electron?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form negative ion?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
What will be the charge present of the molecule XY after chemical combination?
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.
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
Define the following term with an example.
Element
In the nucleus of `""_20"Ca"^40`, there are ______
The smallest unit of an element is ______.
______ is a substance that is made up of three oxygen atoms chemically combined.
