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basic chemistry ard

things to know

QuestionAnswer
Anything that occupesa space and has mass. Matter
Solid, liquid, or gas. Matter exists in one of three states
a. Kinetic b. Potential Energy is the capacity to do work and exists in two forms.
The energy of motion. Kinetic energy is
Stored energy. Potential energy is
Energy is easily converted from one form to another. Energy is easily converted from one form to another.
Carbon, hydrogen, oxygen, and nitrogen. Four elements make up roughly 96% of body weight.
Atoms The smallest particles of an element that retain the characteristics of that element.
Elements are designated by a one or two letter abbreviation called the atomic symbol. Elements are designated by a one or two letter abbreviation called the atomic symbol.
Tightly packed protons and neutrons. Each atom has a central nucleus with.....
a. Protons have a positive charge and weigh 1 atomic mass unit (amu) b. Neutrons do not have a charge and weigh 1 (amu)
a. Electrons are found moving around the nucleus, have a negative charge, and are almost weightless. (0amu) b. Atoms are electrically neutral and the number of electrons is equal to the number of protons
Equal to the number of protons of an element. The atomic number of an element is
the atomic number indirectly tells us the number of electrons. Since the number of protons to the number of electrons
Created by: cathyb