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प्रश्न
What does an atom consist of ? Explain.
उत्तर
An atom consists protons, electrons and neutrons. Protons are positively charged, electrons have negative charge while neutrons have no charge
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संबंधित प्रश्न
WRITE SHORT ANSWER
Define an ionic compound.
Write the names of the elements present in the:-
Ammonia
Write the names of `"FeS"` compounds :
Give two examples for each of ionic and covalent bond.
Name the particle or particles you would expect to find in :
The orbit of an atom
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
Does the particle have an excess of electrons or a deficiency of electrons ?
What are the building blocks of matter ?
How is the size of an atom indicated ?
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
The electron shell ______ is nearest to the nucleus.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form negative ion?
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 electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
State true or false. If false, correct the statement.
An atom is electrically neutral.
Define – Atom.
Atoms of different elements having the same number of ______ are called isotones.
A sample of vitamic C is known to contain 2.58 ×1024 oxygen atoms. How many moles of oxygen atoms are present in the sample?
The ______ are combination of atoms of various elements or the same element.
