Download Atoms Study Guide

Atoms Study Guide
H2O
water
chemists
nucleus
H
O
atoms
blocks
• The world is made up of many tiny things called ____________
• Atoms are the building _____________ of all matter.
• A _______________ is in the middle of every atom.
• Hydrogen is a gas. _______is the short way of writing hydrogen.
• Oxygen is also a gas. It is the most important gas on earth. Living
things need it to breathe. _________ is the short way of writing
oxygen.
• When oxygen atoms and hydrogen atoms join together they make
_______
• _____________ is the short way of writing water.
• People who work with atoms are called _________________. They
use a periodic table that lists all the atoms.
Na
neutrons
+1
8
0
atomic number
0
-1
• The nucleus of an atom is made up of protons and
________________.
• The charge of one proton is ________
• The charge of one electron is _________
• The charge of one neutron is _________
• The number of protons in an atom can be found by looking at the
_____________________________
• The element oxygen has an atomic number of 8 and atomic mass of
16. How many protons does oxygen have? __________
• The overall charge of all atoms is ___________
• The symbol for sodium is _________