Elements, Compounds And Mixtures Flashcards
What is a compound
Two or more elements chemically bonded together
What is a mixture
Two or more elements mixed together but not chemically bonded
What is an element
A substance made from only one type of atom
What is the periodic table
The periodic table is a table showing all of the elements
What are the groups in the periodic table
There are the noble gasses, halogens,non metals,other metals,transition metals, alkali earth metals, alkali metals, rare earth elements
How was the periodic table created
A Russian chemist Dmitri Mendeleev produced the periodic table based on atomic weights but arranged periodically. Elements with similar properties appeared under each other. Gaps were left for yet to be discovered elements
How can elements be presented
Elements are made up of atoms atoms are made of protons, neutrons and electrons eg oxygen has 8 protons 8 neutrons and 8 electrons
How can compounds be broken down
Electricity
How are compound made
Burn them together
How do you name compounds
Get the two or more letters and put them together then add the numbers eg hydrogen and two oxygens = hydrogen oxide2
How can mixtures be separated
You could use a magnet, a Cafetière or a sieve
How do you know when a chemical reaction has occurred
You could see it or feel it, looking different letting out light fizzing, letting out heat or changing colour
