Chemistry
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.
Atomic Structure
28 Likes
Answer
27Al13
Z = 13 , A = 27
(a) electrons = Z = 13
(b) protons = Z = 13
(c) neutrons = A - Z = 27 - 13 = 14
(d) the arrangement of electrons = K[2], L[8], M[3]
Answered By
20 Likes
Related Questions
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.
Ordinary chlorine gas has two isotopes : and in the ratio of 3 : 1. Calculate the relative atomic mass [atomic weight] of chlorine.
Name the element which does not contain any neutrons in it's nucleus.
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.