1.

Part (i) to (v) refer to changes in the properties of elements on moving from left to right across a period of the periodic table. For each property, choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d).(i) The non-metallic character of the elements:(a) decreases(b) increases(c) remains the same(d) depends on the period(ii) The electronegativity:(a) depends on the number of valence electrons(b) remains the same(c) decreases(d) increases(iii) The ionisation potential:(a) goes up and down(b) decreases(c) increases(d) remains the same(iv) The atomic size:(a) decreases(b) increases(c) remains the same(d) sometimes increases and sometimes decreases(v) The electron affinity of the elements in groups 1 to 7:(a) goes up and then down(b) decreases and then increases(c) increases(d) decreases

Answer» Part (i) to (v) refer to changes in the properties of elements on moving from left to right across a period of the periodic table. For each property, choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d).

(i) The non-metallic character of the elements:

(a) decreases

(b) increases

(c) remains the same

(d) depends on the period



(ii) The electronegativity:

(a) depends on the number of valence electrons

(b) remains the same

(c) decreases

(d) increases



(iii) The ionisation potential:

(a) goes up and down

(b) decreases

(c) increases

(d) remains the same



(iv) The atomic size:

(a) decreases

(b) increases

(c) remains the same

(d) sometimes increases and sometimes decreases



(v) The electron affinity of the elements in groups 1 to 7:

(a) goes up and then down

(b) decreases and then increases

(c) increases

(d) decreases


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