Lisposable cups. coated paper cups Polystyrene) cups
Wood
Crude oil
550
200
Raw materials
Mass of 1 cup in s
Energy to produce 1 cup in ks
Energy released when 1 cup is
bumed in ku
Biodegradable
Recydable
166
No
Yes
valuate the use of coated paper compared with poly(styrene) to make
disposable cups.
Use the table above and your knowledge and understanding of LCAS.
6)

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.