grade 10 science --chemistry

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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)


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