Show:
Physical and Chemical Properties
The Periodic Table
Ionic and Molecular Compounds
Chemical Reactions
Any Topic
100
What is Matter?
Anything that has a mass and occupies a space.
100
How are elements arranged on the periodic table?
In order of increasing atomic number (number of protons) and increasing atomic mass.
100
What are two properties of ionic compounds?
High melting and boiling points, Solids at room temperature, made with a metal and a non-metal, Good conductors of electricity, Distinct crystal shape
100
What is a chemical reaction?
When two or more substances combine to produce new substances.
100
What is the name given to the change of state from a liquid to a gas?
Evaporation
200
What is the name given to the change of state from a gas to a solid?
Deposition.
200
What (2 items) does the atomic number of an element tell us?
It tells us the number of protons in one atom of the element. It also tells you the number of electrons before the atom has bonded to anything. (Since the mass of one proton=1 amu, this is also the mass of protons in one atom of the element.)
200
What is the difference between Iron (II) oxide and Iron (III) oxide?
Iron (II) oxide is made using the Fe 2+ ion, and Iron (III) oxide is made using the Fe3+ ion.
200
What is an example of a typical endothermic reaction?
Photosynthesis (chemical reaction) Ice melting (physical reaction)
200
How many atoms are in the molecule: C6H12O6
6 C + 12 H + 6 O = 24 atoms
300
Explain the difference between the physical properties of malleability and ductility.
A substance is malleable if it can be pounded into sheets. A substance is ductile if it can be stretched into a long wire.
300
What group is the most non-reactive and where are they found on the periodic table?
Noble gases, Group 18
300
Name this compound (you can use the periodic table) and tell if it is molecular or ionic: PF5
phosphorus pentafluoride, molecular
300
What does the Law of Conservation of Mass tell us?
Mass of the reactants is equal to the mass of the products in a closed system.
300
What are the three types of subatomic particles within any atom?
Protons Neutrons Electrons
400
Name 3 chemical properties of any substance.
Reaction with acids Reaction to water Reaction to heat Behaviour in air Ability to burn
400
What is the name given to the most reactive group of non-metals and where is the group found in the periodic table?
The Halogens - group 17
400
Tell the name of this compound, and tell whether it has a distinct crystal shape or not: Ca3P2
Calcium Phosphide It is an ionic compound therefore it has a distinct crystal shape.
400
Turn this chemical equation into a word equation: FeO + NaCl --> FeCl2 + Na2O
iron (II) oxide and sodium chloride makes (produces or yields) iron (II) chloride and sodium oxide.
400
If the atomic number of Lithium is 3, and the atomic mass of Lithium is 7, how many protons, neutrons and electrons does Lithium have?
Protons = 3 Electrons = 3 Neutrons = 4
500
What are 4 indicators that a chemical change has taken place?
Change in colour Change in smell Formation of a gas or solid (precipitate) Change in temperature
500
Name 4 physical properties of all metals, and show where they are on the periodic table.
Metals are shiny, malleable, ductile, and conductors of electricity.
500
Describe a test that could be conducted to tell whether a substance is molecular or not. If it is a molecular compound, what would be the result of this test?
Heat it up - if it melts at a low temperature, it is molecular or pass electricity through it - if it does not conduct electricity, it is molecular.
500
Name 2 exothermic reactions and tell what the products and reactants are.
Combustion: Fuel + Oxygen makes carbon dioxide, water and energy Cellular Respiration: Glucose + Oxygen makes carbon dioxide, water and energy
500
What are the names and chemical formulas of the two compounds that can be made from Nickle and Sulfur?
Nickle (II) sulfide, NiS Nickle (III) sulfide, Ni2S3 Ni2+ + S2- forms Nickle (II) Sulfide, and 2Ni3+ + 3S2- forms Nickle (III) sulfide