6Science Quiz 7A

Front

vertical columns of the periodic table

Back

groups

Front

center part of an atom.

Back

nucleus

Front

has a positive charge; located in the nucleus

Back

proton

Front

horizontal rows of the periodic table

Back

periods

Front

has a negative charge; travels around the nucleus

Back

electron

Front

smallest piece of an element that can be recognized as that element

Back

atom

Front

has no charge; located in the nucleus

Back

neutron

Front

the number of protons plus neutrons is the atom's approximate...

Back

atomic mass

Front

Dmitri Mendeleev developed the periodic table of the elements, which _____ elements.

Back

classifies

Front

Abbreviations for the names of elements are chemical

Back

symbols