Chapter 2 Biology count.
Terms
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- A _____ forms when electrons are shared between atoms.
- covalent bonds
- The _____ is the smallest unit of most compounds.
- molecule
- An _____ is formed when one or more elctrons are transferred from one atom to another.
- ionic bond
- Positively and negatively charged atoms are _____
- ions
- intermolecular forces of attraction ______
- van der Waals forces
- A chemical _____ is a substance formed by the chemical combination of two or more elements in definite proportions.
- compound
- _____ is an attraction between molecules of the same substance
- cohesion
- _____ is an attraction between molecules of different substances
- adhesion
- A _____ is a material composed of two or more elements or compunds that are physically mixed together but not chemically combined
- mixture
- _____ indicates the concentration of H+ ions in a solution
- pH scale
- _____ are weak acids or bases that can react with strong acids or bases to prevent sharp, sudden changes in pH
- buffers
- All of the components of a ____ are evenly distributed thorughout the solution
- solution
- macromolecules are formed by a process called _____.
- polymerization
- smaller units, _____, join together to form ____
- monomers, polymers
- Two kinds of nucleic acids: ____ and _____
- DNA, RNA