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Oxidation - Answer Loss of electrons Reduction - Answer Gain of electrons Displacement reaction - Answer When a more reactive element takes the place of a less reactive element in a compound Redox reaction - Answer A reaction where both oxidation and reduction occur Acid - Answer...

How do you measure the rate of a reaction? - Answer By measuring the quantity of a reactant used or the quantity of product formed over time What is the equation for calculating the mean rate of a reaction by measuring the amount of reactant used? - Answer Mean rate of reaction = quantity of ...

What is an *atom*? - Answer smallest part of an element What is an *element*? - Answer a substance that contains only one type of atom What are *chemical symbols*? - Answer - the letter or pair of letters that represents an element. - first letter is always capitalized What are *comp...

Mean rate of reaction (with reactant) - Answer Rate of reaction: Quantity of reactant used ---------------------------- Time taken Mean rate of reaction (with product) - Answer Rate of reaction: Quantity of product formed ---------------------------- Time taken Measurements for q...

What is an atom? - Answer Smallest part of an element that can exist What is an element? - Answer A substance made up of one type of atom How are elements represented? - Answer Using symbols, in the periodic table Approximately how many elements are there? - Answer 100 What is a ...

Avogadro's constant - Answer the number of atoms, molecules, or ions in a mole of any substance (i.e., 6.02 × 10-23 per mol) concentration - Answer the amount of a substance dissolved in a given volume of liquid limiting reactant - Answer the reactant in a chemical reaction that when u...

What is the centre of an atom called? - Answer Nucleus What are the charges on protons, electrons and neutrons - Answer Protons= +1 Electrons= -1 Neutrons= 0 What are the relative masses of protons, electrons and neutrons - Answer Protons= 1 Electrons= 0.0005 Neutrons= 1 Why are a...

Accurate - Answer A measurement is considered accurate if it is judged to be close to the true value. Acid - Answer A sour substance which can attack metal, clothing or skin. The chemical opposite of an alkali. When dissolved in water, its solution has a pH number less than 7. Acids are proto...

What is an exothermic reaction? - Answer A reaction that causes a rise in temperature to surroundings- it releases energy What is an endothermic reaction? - Answer A reaction that causes a decrease in temperature in the surroundings-it takes in energy If a reversible reaction if exothermic...

What is electrolysis? - Answer The breaking down of a substance using electricity Types of electrolysis - Answer Of aqueous ionic compounds Of molten ionic compounds Ionic compound - Answer a compound composed of positive(cations) and negative ions(anions) Why can't ionic compounds...

How metals can be placed in order of reactivity - Answer By their reactions with water and dilute acid When metals react with water or dilute acids - Answer Hydrogen gas is given off. The gas 'pops' with a lighted spill. OIL RIG - Answer oxidation is loss (of electrons), reduction is g...

Air - Answer A mixture of gases. 78% Nitrogen, 21% Oxygen, 0.04% carbon dioxide and other gases. Global Warming - Answer The rise in mean surface temperatures on the earth, thought to be due to increasing amounts of greenhouse gases such as carbon dioxide Greenhouse gas - Answer A gas in...

Mixture - Answer made up of two or more substances that are not chemically combined 3 properties of compounds - Answer -fixed composition, the same ratio of each element -only chemical reactions can separate elements -chemical bonds between atoms 3 properties of mixtures - Answer -no...

Lithium(flame) - Answer Crimson Sodium(flame) - Answer Yellow Potassium(flame) - Answer Lilac Calcium(flame) - Answer orange/red Lithium(flame) - Answer Crimson copper(flame) - Answer green Magnesium(flame) - Answer No colour/white copper - Answer blue precipitat...