grade 10 science －－chemistry
possible evidence of chemical changes
1. a new colour appears 2. a precipitate (a solid material )forms in a liquid 3. heat or light is produced or absorbed 4. the change is generally difficult to reserved 5. bubbles of gas are formed
Hypocarbonous Acid
H2CO - Hypocarbonous Acid
Carbonous Acid
H2CO2 - Carbonous Acid
Carbonic Acid
H2CO3 - Carbonic Acid
Percarbonic Acid
H2CO4 - Percarbonic Acid
Hydrosulfuric Acid
H2S - Hydrosulfuric Acid
Hypophosphorous Acid
H3PO2 - Hypophosphorous Acid
Phosphorous Acid
H3PO3 - Phosphorous Acid
Phosphoric Acid
H3PO4 - Phosphoric Acid
Perphosphoric Acid
H3PO5 - Perphosphoric Acid
Hydrobromic Acid
HBr - Hydrobromic Acid
Hydrochloric Acid
HCl - Hydrochloric Acid
Hypochlorous Acid
HClO - Hypochlorous Acid
Chlorous Acid
HClO2- Chlorous Acid
Chloric Acid
HClO3 - Chloric Acid
Perchloric Acid
HClO4 - Perchloric Acid
Hydrofluoric Acid
HF - Hydrofluoric Acid
Hydroiodic Acid
HI - Hydroiodic Acid
WHMIS
Workplace Hazardous Materials Information System WHMIS legislation requires employers to provide information on safe use of hazardous products used in the workplace
covalent bond
a bond that results from the sharing of outer electrons between non-medal atoms
physical property
a description of a substance that does not involve forming a new substance; for example, colour, texture, density, smell, solubility, taste, melting point, and physical state. it is unique to a pure substance and that can be used to identify the substance
chemical property
a description of what a substance does as it changes into one or more new substance(s).
density 英 [ˈdensəti] 美 [ˈdɛnsɪti] 考研 / CET6 / CET4 / TOEFL / n.密度； 稠密，浓厚； [物]浓度，比重； 愚钝
a measure of how much mass is contained in a given unit volume of the substance density = mass/ volume
molecule
a particle in which atoms
element
a pure substance that cannot be broken down into simpler substances
corrosion 英 [kə'rəʊʒn] 美 [kəˈroʒən] n.腐蚀，侵蚀，锈蚀； 受腐蚀的部位； 衰败；
corrosion ability 腐蚀性
peroxide 英 [pəˈrɒksaɪd] 美 [pəˈrɑksaɪd] IELTS n.过氧化氢； 过氧化物； vt.用过氧化氢漂白（头发等）；
hydrogen peroxide 过氧化氢
freezing point
is the temperature at which a substance changes state from a liquid to a solid.
melting point
is the temperature at which a substance changes state from a solid to a liquid.
boiling point
is the temperature at which a substance changes state rapidly from a liquid to a gas
MSDS
materials safety data sheet
alkali metal
the elements ( except hydrogen) in the first column of the periodic table ( group 1)
noble gases noble 英 [ˈnəʊbl] 美 [ˈnoʊbl] adj.高尚的； 贵族的； 外表庄严和庄重的； 表现出崇高的 n.尊贵的人； 旧时在英国使用的金币；
the elements in the eighteenth column of the periodic table ( group 18)
alkali earth metals
the elements in the second column of the periodic table ( group 2)
halogens 卤族 halogen 英 [ˈhælədʒən] 美 [ˈhælədʒən] n.卤素；
the elements in the seventeenth column of the periodic table ( group 17)
