YR 8 - Chemistry [Chemical Reactions] Flashcards
What are all substances made of?
All substances are made from particles called atoms.
What are elements
Elements are the simplest substances and are only made up of one atom.
What are compounds?
Compounds contain 2 or more elements chemically bonded.
What are mixtures?
Mixtures contain 2 or more elements or compounds not chemically bonded. Mixtures can be separated.
How can mixtures be separated?
Mixtures can be separated using techniques such as: filtration, chromatography, evaporation and distillation.
What is the periodic table?
The periodic table is a list of all the elements.
What are the verticals columns and horizontal rows called?
The vertical columns are called groups. The horizontal rows are called periods.
What can the periodic table be split into?
The Periodic table can be split into Metals and Non-metals.
What happens when an element is burnt in air?
When an element burns in air, an oxide is produced.
What are signs of a chemical reaction?
Signs of a chemical reaction: colour change, change in temperature, production of a gas, production of a new substance.
What can compounds do in chemical reactions?
In chemical reactions, compounds can change into other compounds, or make elements.
What do chemical equations show?
Chemical equations show what happens in a reaction. Reactant —> Products.
What are precipitates?
Precipitates are solids which are made when two liquids react together.
What does a metal produce when reacting with an acid?
A metal reacts with an acid to make a salt and hydrogen gas.
What does hydrochloric acid, sulphuric acid and nitric acid make?
Hydrochloric acid makes chloride salts. Sulphuric acid makes sulphate salts. Nitric acid makes nitrate salts.
