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(a)An atom Q can be represented as #\ _24^52Q# What does the number 52 represent?
(b)Study the information in the table below and answer the questions that follow
(Letters are not the actual symbols of the elements).
(i)Write the formula of the of the compound formed when N reacts with P. ( Atomic numbers are N=20;P=17)
(ii) Identify the elements which belong to the third period of the periodic table. Explain.
(iii)Which of the elements identified in b (ii) above comes first in the third period?Explain.
(iv) Select two elements which are non-metals.
(c ) The table below gives some properties of substances I, II, III and IV. Study it and answer the questions that follow.
(i) What type of bonding exists in substances I and II?
(ii) Which substances is likely to be sulphur? Explain.