Structure and Function of the Body: Chapter 2 (with complete solutions)

Levels of Chemical Organization correct answers 1. Matter 2. Atom 3. Elements 4. Molecules 5. Compounds Atoms correct answers Basic units of matter Subatomic Particles of Atoms correct answers 1. Protons 2. Electrons 3. Neutrons Nucleus correct answers Central core of an atom composed of positively charged protons and uncharged neutrons Proton correct answers Positively charged particles in nucleus Neutron correct answers Uncharged particle in nucleus Atomic Number correct answers Number of protons in the nucleus which determines the type of atom Atomic Mass correct answers Number of protons and neutrons combined Energy Levels correct answers Regions surrounding atomic nucleus that contains electrons. Can contain up to 8 electrons in each level. Energy increases with distance from nucleus. Electron correct answers Negatively charged particle Element correct answers A pure substance; made up of only one kind of atom Molecule correct answers A group of atoms bound together in a group Compound correct answers Substances whose molecules have more than one kind of atom Chemical Bonds correct answers Form to make atoms more stable -Atoms react with one another to make their outermost level full -Atoms may share/donate/borrow electrons to become stable Ions correct answers Forms when an atom gains or loses electrons in its outer energy level to become stable.