Atomic Structure Vocabulary Crossword

The number of protons in the nucleus of an atom.
A subatomic particle in an atom's nucleus that has a positive charge.
Atoms of the same element with different numbers of neutrons.
This element has an atomic number of 12.
A subatomic particle that has a negative charge.
A subatomic particle that has no change and that is found in the nucleus of an atom.
The sum of the number of protons and neutrons in an atom.
What is the mass number of an atom with 5 protons, 5 electrons, and 6 neutrons?
A weighted average of the mass numbers of the isotopes of an element. Found on the periodic table.
Two or more elements chemically combined.
Oxygen is an example of what classification of matter?
A fruit salad would be an example of this type of mixture.
This type of mixture appears uniform in composition.
This type of matter has a fixed composition and cannot be separated physically.
The smallest unit of matter.
Discovered the electron and came up with the Plum Pudding Model of the atom (last name only).
Said atoms are mostly empty space (last name only).