Atoms, Acids and Bases Crossword

Sub-atomic particle that has a positive charge
Sub-atomic particle that has mass but no charge
Sub-atomic particle that orbits the nucleus
The clump of protons and neutrons in the centre of an atom
Scientist who suggested the "Plum Pudding" model of the atom
The name of our current model of the atom
Substances that turn litmus paper red
Phenolphthalein, Methyl Orange and Bromothymol Blue are all examples of...
A substance containing only one type of atom
The name of particles with two or more atoms chemically bonded together
The colour of phenolphthalein in a substance with a pH of 13
Substances that are bitter to taste
Scientist who fired particles at thin gold foil and proved that the atom is mostly empty space
The ...... number of an atom is the number of protons in the nucleus
The ...... number of an atom is the number of protons plus neutrons in the nucleus
In a neutral atom, there will be ...... numbers of protons and electrons
When an atom loses or gains electrons, it becomes charged and is called an .....