Advertisements
Advertisements
प्रश्न
Define the following term with an example.
Metalloid
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
ANSWER IN DETAIL
Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?
Define:- Atom
Define:- Molecule
Write the names of `"FeS"` compounds :
What does an atom consist of ? Explain.
Name the particle or particles you would expect to find in :
The nucleus of an atom
What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?
Name the unit in which the radius of an atom is usually expressed.
What value has been given to the mass of this reference atom ?
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
Calculate the number of moles in 12.044 × 1025 atoms of phosphorus.
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
Deduce from the datum provided.
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number |
| \[\ce{_6^14C}\] | Mass number |
| \[\ce{_17^37 Cl}\] | Proton number |
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
Select the correct answer to the statement given below:
Imaginary path around the nucleus of an atom in which electrons revolve.
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
Name the sub-atomic particles.
Which of the following statements made by Dalton has not undergone any change?
The volume occupied by 4.4 g of CO2 at S.T.P ______
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
