Chemistry
The electronic configuration of three elements A, B and C are as follows :
A — 2, 8, 8, 2;
B — 2, 8, 7
C — 2, 4
(i) Which of these can form cations ?
(ii) Which of these can form anions ?
(iii) Write a formula of a covalent compound formed using these elements
Related Questions
Distinguish between the following pairs of substances :
(i) Sodium sulphide and sodium sulphite
(ii) HCl gas and chlorine gas
Al2O3 is the formula of Aluminium oxide. Write the formulae of :
(i) Aluminium nitrate
(ii) Aluminium phosphate
(i) What do you understand by the term 'isotopes'?
(ii) Why do isotopes of an element possess identical chemical properties ?
(iii) Name the isotope of hydrogen which do not have a neutron in it.
(i) Why is it necessary to compare gases at STP ?
(ii) What are the STP conditions ?