Unit 6 Lesson 3 Atoms and Elements ~ Part 1

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a chart used to organize and arrange the elements in order of their atomic number and in groups with similar properties

subatomic particles that have a negative elective charge

the number of protons in an atom

the basic building blocks of matter; the smallest unit of an element that maintains the properties of that element

a region around the nucleus of an atom where the electrons are likely to be found

subatomic particles that have a positive electric charge

a one-, two-, or three-letter abbreviation of the name of an element; an abbreviation or letters that represent an element

a pure substance made up of entirely the same type of atom; a substance that cannot be broken down into simpler materials