Which of these is not a method in which mixtures can be separated?
The ______________________ model was described as a ball of positive stuff with negative electrons scattered throughout
What was fired at gold foil to discover that atoms have a tiny nucleus?
What charge does a neutron have?
The mass number of an atom tells us...
Elements in the same ___________ have similar chemical properties
What is the name given to the Group 7 elements?
How was Mendeleev's periodic table different to the one we use today?
What do ionic bonds form between?
What happens to electrons in a covalent bond?