An _______ contains a central _________ surrounded by __________. The Nucleus consists of ___________ and ___________. The Protons have a ___________ charge and the Electrons have a __________ charge.
Nucleus, Positive, Atom, Negative, Neutrons, Electrons, Protons
Atoms and Elements
An ________ contains only one type of _________.
Elements can by written as _________ . These may be 1 or 2 letters where only the 1st letter is a CAPITAL letter.
A Calcium atom has the symbol ______ .
Ca, Atom, Symbols, Element