Chemistry

Question 1

Base

Answer 1

• substance that yields hydroxyl ion (OH-) when dissolve in water
• aqueous solutions taste bitter, feel slippery, turn blue, react with acid to form salt
• alkaline

Question 2

carbon fiber

Answer 2

strong, think fiber made by pyrolyzing (decomposed by heat) synthetic fibers like rayon

Question 3

chlorofluorocarbon (CFC)

Answer 3

chemical that contain chlorine, fluorine, and carbon that damages ozone

Question 4

Element

Answer 4

• substance that cannot be chemically decomposed into simpler substance
• all atoms of an element have the same number of protons and electrons

Question 5

Isotope

Answer 5

same number of proton, but different nuetrons

Question 6

molecule

Answer 6

• basic unit of chemical compound

- two or more atoms bound together

Question 7

noble gases/ inert gases

Answer 7

• helium, neon, argon, krypton, xenon, and radon

Question 8

osmosis

Answer 8

transfer of fluid across a semipermeable membrane, usually from an area of HIGH concentration to LOW concentration

Question 9

phase

Answer 9

solid, liquid, gas, plasma

- change according to temperature and pressure

Question 10

polymer

Answer 10

big molecule containing 100 or 1000 of smaller molecule arrange in repeating units

Question 11

salt

Answer 11

Na

neutral compound produce by the reaction of acid and a base

Question 12

Acid

Answer 12

• class of compound that contrasts with bases
• taste sour, turn red/pink, produce hydrogen gas in some metal
• donate protons in chemical reactions