The following table gives the atomic numbers of elements V, W, X, Y and Z.
|
Element |
V | W | X | Y | Z |
|
Atomic number |
11 | 16 | 18 | 19 | 24 |
(a)Which of the elements: (i) belong(s) to group 1?
(ii) is/are riotle gas(es)?
(iii) form(s) coloured compound(s)?
(iv) form(s) an anion?
(v) react(s) with water to liberate hydrogen?
(vi) react(s) with water to form alkaline solution?
(b) What is the:
(i) charge on the ion formed in
(a)(iv) above?
(ii) group of the element(s) in (a)(i) above?
(c)(i) Write the formula of the compound formed between element V and element W.
(ii) Sate the type of bond formed in (c)(i) above. Explain your answer.
(d)(i) What is a covalent compound?
(ii) Give two factors that influence covalent bonding.
(iii) State the type of bond that exists in each of the following substances: MgO, NH(_3) and Fe.
(iv) What are intermolecular forces?
Explanation
(a)(i) V and Y (ii) X (iii) Z (iv) W (v) V and Y (vi) V and Y
(b)(i) — 2 or 2— (ii) Akali metals
(c)(i) V(_2) W
(ii) Bond — ionic / electrovalent V can readily lose its electron W can readily accept electrons to attain stability.
(d)(i) A ccmpond formed by two atoms which donate equal no of electrons that are shared between them such that each achieves a stable octet.
(ii) * electronegativity (difference) * ionization energy * electron affinity
(iii) MgO — ionic / eiectroyalent
NH(_3) — covalent
Fe — metallic
(iv) Intermolecular forms. are attractive forces that operate between molecules and influence the properties of the substance.