Chemistry
Ordinary chlorine gas has two isotopes : and in the ratio of 3 : 1. Calculate the relative atomic mass [atomic weight] of chlorine.
Related Questions
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.