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27 Cards in this Set

  • Front
  • Back

Matter

anything that occupies space

Elementss

cannot be broken down by another substance

Proton

positively charged particle

Nuetron

electrically neutral

Electron

Negatively charged particle

Atomic Symbol and Mass

weight

Isotopes

same number of protons, different number of neutrons, identical behavior

Compound

substance of two or more elements combined in a fixed ratio

Molecule

atoms held together by covalent bonds

Covalent Bonds

2 atoms share a pair of electrons

Polar Covalent Bonds

electrons shared unequally

Nonpolar Covalent Bonds

electrons shared equally

Solutes

substance that is dissolved

Solution

liquid consisting of a mix of 2 or more substances

Hydrophobic

water repels

Hydrophilic

water absorbs

Buffer

minimize changes in Ph

Ph-scale

determines how basic or acidic a solution is

Base

1-6 on the ph scale


donates hydrogen

Acid

8-14 on ph scale


reduces hydrogen

CHNOPS + Ca & K

Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfate




Calcium and Potassium

Adhesions

clinging of one substance to another

Cohesion

tendency of molecules to stick together

Thermal Energy

random movement of atoms and molecules

Evaporative Cooling

water cooling, molecules with greatest energy leave

Solvent

dissolving agent

Biodiversity

The variety of living things