1. (a) Why do most of the elements form ions?
(b) What kind of elements form cations? Support your answer by two examples.
(c) What kind of elements form anions? Support your answer by two examples.
2. Explain the formation of a molecule of oxygen by sharing pair/pairs of electrons.
Answers
Explanation:
Zinc element form cations
1 a) Elements form ions to gain stability by attaining noble gas configuration. They lose or gain electrons to form ions that leads to completely filled outer shell configuration and hence stability.
b)Cations can be formed from metal elements, as well as nonmetal elements. If a metal element forms an ion, it always forms a cation. Some metals always form the same type of cation. For example, sodium always forms a +1 cation and magnesium always forms a +2 cation.
c)They are formed when non-metal gains the electrons. They gain one or more than one electron and do not lose any protons. Therefore they possess a net negative charge. Some examples of anions are Iodide (I–), chlorine (Cl–), hydroxide (OH–).
2.The two oxygen atoms share two electrons so that they each have 8 electrons in their outer shell and are therefore full. They are bonded together with a covalent bond. A covalent bond is a strong bond when two atoms are sharing outer electrons.