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प्रश्न
Define the following term with an example.
Metalloid
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उत्तर
Metalloid: Metalloid is a chemical element that exhibits some properties of metals and some of non-metals. Metalloids are generally semi-conductors.
Ex.: Silicon. Arsenic, Antimony and Boron.
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संबंधित प्रश्न
Define:- Molecule
Define:- Radicals
Write the names of the elements present in the following compound.
Common salt
Write the names of the elements present in the:-
Ammonia
Define: Chemical bond
Give the charge and the mass of an electron, proton and neutron present in an atom ?
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
How did Neils Bohr visualise the atom ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X?
Which of the following statement is correct about the atom of an element ?
Electron, proton, neutron are the types of ______ in an atom.
Deduce from the datum provided.
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number |
| \[\ce{_6^14C}\] | Mass number |
| \[\ce{_17^37 Cl}\] | Proton number |
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form negative ion?
State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.
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.
Name the sub-atomic particles.
An atom of an element has no electron. Will that atom have any mass or not? Can an atom exist without electron? If so then give example.
1 mole of Gold and Silver contain same number of atoms.
The most abundant type of atom is the universe is ______.
