The metals like Na and Mg are towards the left-hand side of the periodic table while non- metals like sulphur and chlorine are found on the right-hand side. In the middle, we have silicon, which is classified as a semi-metal or metalloid. I. Elements in the middle of periodic table, is classified as metalloid because: i. They tend to lose electrons very easily ii. They tend to gain electrons very easily iii. They exhibit properties of both metals and non- metals iv. None II. Metals on the left-hand side are reactive because i. They are highly electronegative ii. They are highly electropositive iii. They are neutral iv. NoneIII. Metallic character ......... across a period as one goes from left to right. i. Increases ii. Decreases iii. Remains the same iv. None IV. Oxides of metals are ......... and that of non- metals are .......... in general. i. Basic, acidic ii. Acidic, basic iii. Neutral, neutral iv. None V. Non- metals are electronegative because: i. They tend to form bonds by sharing electrons ii. They tend to form bonds by losing electrons iii. They tend to form bonds by gaining electrons iv. None