Atoms and Molecules
What is anything that has mass and takes up space?
Matter
What is a substance that is smaller than an atom?
Subatomic Particle
Water is made through the covalent bonding of two ________ atoms and one ______ atom.
Hydrogen, Oxygen
Carbon and hydrogen are called _______ ________ because they make up more than 90 percent of every living organism.
Organic Elements
What changes the identity of the original substances that were combined?
Chemical Bonds
What is the smallest unit of matter and absorbs then releases energy?
Atom
_______ hold a positive electrical charge, _________ hold a negative charge, and ________ do not have a charge.
Protons, Electrons, Neutrons
The ability to attract electrons is called ____________.
Electronegativity
What is an incredibly stable substance that can bond with itself?
Carbon
In all chemical reactions, there are _________, which are the substances that interact with one another, and ________, the result of the reaction.
Reactants, Products
An _______ is any substance that cannot be broken down into any simpler chemical substance.
Element
What is the process where atoms interact with other atoms to lower their energy?
Atomic Bonding
What occurs due to unequal sharing of electrons between atoms in a molecule?
Dipole
What is the simplest kind of organic compound?
Hydrocarbon
What are molecules that affect the rate of chemical reactions?
Enzymes
Each element on the periodic table is assigned a ________ ______, which is one or two letters.
Chemical Symbol
What are a group of atoms bonded together?
Molecules
_______ _______ is the rigidity of a liquid caused by the bonds created in its surface.
Surface Tension
_____________ PROVIDE an organism with energy, while _______ is a sugar which is broken down to PRODUCE energy.
Carbohydrates, Glucose
What are the 4 different types of chemical reactions?
Combination, Decomposition, Combustion, Displacement
The ______ ______ is the number of protons an atom contains.
Atomic Number
Combinations of two or more different atoms are called _________.
Compounds
What is the most abundant element in humans?
Oxygen
______ assist in the storage of energy, _______ are required for the function of the body, and _______ _____ are responsible for storing the information that allows the body to make proteins.
Lipids, Proteins, Nucleic Acids
The amount of energy needed to start a chemical reaction is referred to as __________ ______.
Activation Energy