Question 2 b)II. Distinguish between:
1) Universal gravitational constant – Gravitational acceleration of the earth
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2) Group – Period
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3) s-block – p- block
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4) Group17 – group 18
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5) Mendeleev’s periodic table – Modern periodic table
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6) Concave lens – Convex lens
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7) Farsightedness- Nearsightedness
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8) Myopia – Presbyopia
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9) Metals -Nonmetals (physical characteristics)
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10) Roasting – Calcination
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11) Froth floatation – Leaching
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12) Saturated hydrocarbons – Unsaturated hydrocarbons
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13) Open chain hydrocarbons -closed chain hydrocarbons
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14) Alkane- Alkene
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15) High Earth orbit – Medium Earth orbit.
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