eQuizShow

S2 Revision Periodic Table and Chemical Reactions

Atomic Structure

Question: What type of charge do protons carry?
Answer: Positive

Question: What type of charge do electrons carry?
Answer: Negative

Question: What type of particles does a nucleus of atom have?
Answer: Protons and neutrons

Question: The atomic number is the number of neutrons in a nucleus of an atom. True or False?
Answer: FALSE. The atomic number is the number of protons in a nucleus of an atom.

Question: If an element has 3 protons in its nucleus, its atomic number is 3. True or False?
Answer: TRUE

Periodic Table

Question: The element "Iron" has a symbol of "Ir". True or False?
Answer: FALSE. The symbol for "Iron" is "Fe". "Ir" is the symbol for "Iridium"

Question: What is the symbol for bromine?
Answer: Br

Question: What is the name of group 8 (or group 0)?
Answer: Noble gases

Question: What is the name of group 7?
Answer: Halogens

Question: In which group do lithium, sodium and potassium belong to? Which is more reactive among those three?
Answer: They belong to group 1 or alkali metals. Potassium is the most reactive among those three.

Chemical Reactions

Question: When two elements reacted together, a bright light was produced. That means that a chemical reaction has taken place. True or False?
Answer: TRUE. There was an energy change.

Question: When mixing potassium iodide and lead nitrate (both colourless) a yellow precipitate was produced. That means that a chemical reaction has taken place. True or False?
Answer: TRUE. There was a colour change and a precipitate.

Question: The indicators of chemical reactions are:
Gas given off
Solid formed
Colour change
and...?

Answer: Energy change

Question: When iron (which is attracted to magnets) and sulfur (which is not attracted to magnets) are heated up, they produce a compound called sulfur iodide. The compound will have the same property as iron, as a result it will be attracted to magnets. True or False?
Answer: FALSE. The compound has different properties that the constituent elements.

Question: In order to have a chemical reaction it is necessary to have ALL the following: gas given off, solid formed, energy change AND colour change. True or False?
Answer: FALSE. There is no need to have ALL the above. One indicator is enough to have a chemical reaction.

Word equations

Question: Potassium and chlorine combine to form potassium chloride.
Answer: Potassium + Chlorine --> Potassium chloride

Question: The substances that react are called products. True or False?
Answer: FALSE. They are called reactants.

Question: Sodium and chlorine react and produce sodium chloride. Sodium chloride is the reactant. True or False?
Answer: FALSE. Sodium chloride is the product.

Question: Magnesium is burned with the use of a Bunsen burner, so it reacts with oxygen. The product is magnesium oxide.
Answer: Magnesium + Oxygen --> Magnesium oxide

Question: Potassium reacts with water vigorously. Hydrogen and potassium hydroxide are produced.
Answer: Potassium + Water --> Hydrogen + Potassium hydroxide

Naming compounds

Question: Hydrogen + Chlorine -->
Answer: Hydrogen chloride

Question: Sodium + Sulfur -->
Answer: Sodium sulfide

Question: Lithium + Oxygen -->
Answer: Lithium oxide

Question: Hydrogen + Oxygen -->
Answer: Hydrogen oxide

Question: Calcium + Nitrogen -->
Answer: Calcium nitride