Basis of Life Crossword

The smallest unit of an element
A subatomic particle, fundamental to all matter except hydrogen
A unit of matter composed of two or more atoms held together by chemical bonds.
A chemical substance composed of atoms of two or more elements
Anything that occupies space and has mass.
A substance particle that is fundamental to all matter. It exists in the nucleus, with a positive charge and a mass approximately equal to that of a neutron.
A subatomic particle, fundamental to all matter, existing in orbit around the nucleus of an atom and carrying a negative charge
The positively charged center of an atom which contains both the protons and neutrons of the atom.
The number of protons in a the nucleus of the atom.
A pure substance that cannot be broken down by chemicals into different substances; a basic building-block of matter
The path around the nucleus of an atom in which contains both the protons and the neutrons of the atom
Two or more substances mixed together, but not chemically combined.
Containing two atoms
The mass of an element; approximately equal to the number of protons and neutrons in its nucleus