Matter and Energy Basics October 6, 2015October 6, 2015October 6, 2015

Matter Matter is anything that has mass and volume. Almost everything in the universe is made of matter. Matter is anything that has mass and volume. Almost everything in the universe is made of matter. Matter is made of atoms, which are the smallest part of an element that still has that element's properties. Matter is made of atoms, which are the smallest part of an element that still has that element's properties.

Elements Elements are substances that cannot be changed into simpler substances by chemical reactions. Elements are forms of matter that contain ONLY ONE type of atom. Elements are substances that cannot be changed into simpler substances by chemical reactions. Elements are forms of matter that contain ONLY ONE type of atom. The building blocks of matter are atoms. The building blocks of matter are atoms.

Atomic Structure Atoms are made up of three parts: Atoms are made up of three parts: Neutrons Neutrons Protons Protons Electrons Electrons

The Nucleus The nucleus contains (+) charged protons and neutral (0) charged neutrons, which make up more than 99.9% of an atom's mass. The nucleus contains (+) charged protons and neutral (0) charged neutrons, which make up more than 99.9% of an atom's mass. The nucleus is in the center of an atom and has an overall positive charge. The nucleus is in the center of an atom and has an overall positive charge.

Electrons Much smaller, negatively (-) charged electrons move around the nucleus much like bees move around a beehive. Much smaller, negatively (-) charged electrons move around the nucleus much like bees move around a beehive.

Atom Facts The nucleus is tiny. Most of an atom is empty space! The nucleus is tiny. Most of an atom is empty space! An atom is composed of 99.9% nothing! An atom is composed of 99.9% nothing! You are composed of 99.9% nothing! You are composed of 99.9% nothing!