Name the isotopes of hydrogen. What is the importance of heavier isotopes of hydrogen?
1 Answers
Talk Doctor Online in Bissoy App
Would you expect the first ionization enthalpies for two isotopes of the same element to be the same or different? Justify your answer.
The ionization enthalpy of an atom depends on the number of electrons and protons (nuclear charge) of that atom. Now, the isotopes of an element have the same number of...
1 Answers 1 views
Write the electronic configuration of any pair of isotopes and isobars.
Two isotopes of carbon are 6C12 and 6C14 The electronic configuration of 6C12 is 2, 4. The electronic configuration...
1 Answers 1 views
Explain with examples (i) Atomic number, (ii) Mass number, (iii) Isotopes and (iv) Isobars. Give any two uses of isotopes
(i) Atomic number The atomic number of an element is the total number of protons present in the atom of that element. For example, nitrogen has 7 protons in its atom....
1 Answers 1 views
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes 8 X 16 and 8 X 18 in the sample?
Since average atomic mass = 16 x X + 18 x (100 – X )/100 16.2 = 16X + 1800 – 18X/100 1620 = – 2X + 1800 2X = 1800 – 1620 X =...
1 Answers 2 views
Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?
Seema will have to apply larger force since she will experience more frictional force because heavy object will be pressed hard against the opposite surface and produces more friction.
1 Answers 2 views
Maximum covalence of nitrogen is '4' but the heavier elements of group 15 show covalence greater than '4' Why ?
[Hint : Nitrogen is not having vacant d- orbitals in its octet, hence cannot expand its octet, while heavier members have vacant d-orbitals to expand their octet.]
1 Answers 1 views
Nitrogen exists as a diatomic molecule with a triple bond between the two atoms, whereas the heavier elements of the group do not
[Hint : p-p multiple bonds are formed by N due to its small size.]
1 Answers 1 views
Write the importance of ciliary muscles in the human eye. Name the defect of vision that arises due to gradual weakening of the ciliary
Ciliary muscles adjust the curvature of the eye lens and change its focal length. Weakening of ciliary muscles leads to presbyopia. This can be corrected by a bifocal lens. (a) Akshay...
1 Answers 1 views
In which of the following situations the heavier of the two particles has smaller de Broglie wavelength?
(a) move with the same speed (c) move with the same kinetic energy (d) have fallen through the same height.
1 Answers 1 views
The heavier nuclei tend to have larger N/Z ratio because (a) a neutron is heavier than a proton
(c) a neutron does not exert electric repulsion
1 Answers 1 views