Science Periodical Test Review

Study Notes

Second Periodical Test Review

Copper and aluminum are used in cooking pans due to their excellent heat conductivity.
When oxygen combines with magnesium, it tends to share two electrons.
Covalent compounds do not conduct electricity when dissolved in water because their bonds are weak.
Examples of organic compounds include vinegar, liquefied petroleum gas, and nail polish remover.
Organic compounds contain carbon and can be produced by living things or artificially.
Butane (C₄H₁₀) is a hydrocarbon with 4 carbon and 10 hydrogen atoms.
The presence of double bonds is a key characteristic of alkenes, differentiating them from other hydrocarbons.
Cooking gas is a mixture of propane (C₃H₈) and butane (C₄H₁₀).
Isomers are organic compounds with the same functional groups but different arrangements.
Propane (C₃H₈) is a hydrocarbon with a double bond.
Calcium carbide in water produces acetylene, used for metal melting.
Carbonyl compounds have functions like cleaning, preserving, and embalming.
Carbon monoxide is a toxic byproduct of incomplete hydrocarbon combustion.
Acetone is an organic solvent used in pharmaceuticals.
Kerosene and liquefied petroleum gas are highly flammable organic compounds.
Kerosene can be used for cooking.
Lubricating oil minimizes friction in bicycle ball bearings.
One mole of a substance contains Avogadro's number (6.02 x 10²³).
Moles are used to measure the amount of substance.
Washing soda (sodium carbonate, Na₂CO₃) has a formula mass of 106 g/mol.
Phosphoric acid (H₃PO₄) has 31.6% phosphorus by mass.
Molecular mass is used for covalent compounds.
Acetone ((CH₃)₂CO) has a molecular mass of 58 g/mol.
A silicon chip (in an integrated circuit) with 6.2 grams has 0.22 moles and 1.3 x 10²⁵ silicon atoms.
The molar mass of a compound is the sum of its element molar masses.
The molecular mass of water (H₂O) is 18 g/mol. Six grams of water contain 0.33 moles.

Description

Prepare for your second periodical test in science with this comprehensive review. The quiz covers essential topics such as heat conductivity of metals, the nature of covalent and organic compounds, and characteristics of hydrocarbons. Test your knowledge on chemical bonding and isomerism to ensure you're ready for the exam.