Chemistry
Ordinary chlorine gas has two isotopes : and in the ratio of 3 : 1. Calculate the relative atomic mass [atomic weight] of chlorine.
Atomic Structure
91 Likes
Answer
Given, and are in the ratio of 3 : 1
Therefore, ratio of atomic masses = 3:1
Total mass = [3 x 35] + [1 x 37] = 105 + 37 = 142
Relative atomic mass of chlorine =
= = 35.5
Answered By
49 Likes
Related Questions
Chlorine is an element of atomic number 17. It is a mixture of two isotopes having mass number of 35 and 37.
(i) What is meant by 'atomic number of an element' ? What do you understand by an 'atom'.
(ii) Write down the electronic configuration of the chlorine atom.
(iii) State the number of protons, electrons and neutrons in the following isotopes: ,
(iv) Explain why the two atoms in (iii) above have the same chemical reactions.
(v) If molten magnesium chloride is electrolysed suggest a suitable electrode [anode].
Five atoms are labelled V to Z
Atoms Mass Number Atomic Number V 40 20 W 19 9 X 7 3 Y 16 8 Z 28 14 (i) Which one of these atoms has an electronic configuration 2, 7? (2) has an electronic configuration 2, 7 ?
(ii) Write down the formula of the compound formed by atoms X and Y.
The atom of aluminium is represented by 27Al13. State the number of :
(a) electrons
(b) protons
(c) neutrons
(d) the arrangement of electrons
in the different orbits or shells in one atom of aluminium.
Elements A, B and C have atomic numbers 9, 20 and 10 respectively.
(i) State which one is (1) a non-metal; (2) a metal; (3) chemically inert.
(ii) Write down the formula of the compound formed by two of the above elements.