Atoms And molecules Flashcards
Chemistry
Study of matter
Atom
Smallest piece of an element
Elements
Substances Only containing One kind of atom
Nucleus
Center Section of an atom made up of protons and neutrons
Protons
Have positive charge
Neutrons
Have no charge
Atomic mass
The Sum of protons and neutrons
Electrons
Negatively charged
Shell
Cloud likes space surrounding the nucleus
Atomic Number
The number of protons in its nucleus
Atomic Theory
How scientist think how an atom looks like
Particles accelerators
Machines that smash Atoms
Chemical symbols
Abbreviations for the names of elements
Periodic table of the elements
The Grouping of the elements in rows and columns based on their chemical and physical properties
Periods
The horizontal rows of the periodic table elements in the same period have the same number of shells