Bonding
This type of bonding occurs when atoms share electrons.
What is covalent bonding?
This gas is released when a metal reacts with an acid
What is hydrogen?
In an exothermic reaction, energy is transferred in this direction.
What is from the reaction to the surroundings?
This is the pH of a neutral substance, like pure water.
What is 7?
Chocolate melts in your hand because of this type of change, which doesn’t make a new substance.
What is a physical change?
Ionic bonding happens between these two types of elements.
What are metals and non-metals?
The reactivity series lists metals in order of how easily they react. This metal is the most reactive.
What is potassium?
This type of reaction absorbs heat, making the surroundings colder.
What is an endothermic reaction?
An acid has a pH below this number.
What is 7?
Easter eggs are often wrapped in foil made from this metal, which is soft, shiny, and conducts heat well.
What is aluminium?
Metals have this type of bonding, which allows them to conduct electricity
What is metallic bonding?
This metal is used to galvanize iron to prevent rusting.
What is zinc?
Burning fuel (combustion) is an example of this type of reaction.
What is an exothermic reaction?
When an acid reacts with a base, it forms this type of reaction.
What is neutralisation?
Boiling eggs causes the egg white to go solid. This is an example of this type of change
What is a chemical change?
In an ionic bond, metals lose electrons to become these
What are positive ions (or cations)?
Metals high in the reactivity series are extracted using this process because they are too reactive to be reduced by carbon.
What is electrolysis?
"In an energy profile diagram, this energy is needed to start the reaction"
What is activation energy
This ion is responsible for making a solution acidic.
What is H⁺ (hydrogen ion)?
If you add vinegar to eggshells, they dissolve because vinegar is one of these substances.
What is an acid?
Diamond and graphite are both forms of this element, but they have different properties due to their bonding.
What is carbon?
This type of reaction occurs when a more reactive metal displaces a less reactive metal from a compound
What is a displacement reaction?
When a reversible reaction is exothermic in one direction, it must be this in the opposite direction.
What is endothermic?
A strong acid fully does this in water, releasing more hydrogen ions
What is ionises (or dissociates)?
Easter egg dyes often contain food colouring. These colours can be separated using this method of separating mixtures.
What is chromatography?