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 14 7 (i) Which one of these atoms (1) contains 7 protons; (2) has an electronic configuration 2, 7 ?
(ii) Write down the formula of the compound formed by atoms X and Y.
Elements X, Y, Z have atomic numbers 6, 9 and 12 respectively. Which one :
(i) forms anion – negative ion;
(ii) forms cation – positive ion;
(iii) has 4 electrons in the outermost orbit.
The atom of aluminium is represented by 27Al13. Write down 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.
Name the element which does not contain any neutrons in it's nucleus.