basic structure
when atoms collide
classifying atoms
100
I am found in the nucleus of an atom. I have a no charge which makes me neutral.
Hint: no and neutral start with an N
What is the neutron?
100
I am a substance that is made up of more than one atom. I can be made up of atoms of the same element or atoms of different elements combined together. Some types of me are called compounds.
Hint: Water, oxygen, and ozone are examples. 
What is a molecule?
100
I am special electrons. I am responsible for bonding because I am moving near the outside of an orbital shell.
What are valence electrons?
200
I am found zipping around the outside of an atom. I have a negative charge. I am quite energenic.
hint: Energenic starts with an E
What is the Electron?
200
I am a type of molecule. I am made up of at least two different types of elements. Water is a good example me.
What is a compound?
200
I am a table that organizes the elements into groups and families based on their properties. 
What is the periodic table?
300
I have a positive charge and am found in the nucleus of an atom.
hint: positive starts with a P
What is the proton?
300
To form molecules and compounds, I must happen. I am an action verb meaning that atoms share or exchange electrons so that they stick together.
Hint: friends often do this when they hang out.
What is bonding?
300
I am found on the periodic table for each atom. I am the number of protons an atom of each element has. I can be used to identify an element.
Hint: Each element on the table goes up by one NUMBER......
What is the atomic number?
400
I am the center of an atom. I contain the neutrons and the protons.
Hint: you find a similar item in the middle of a cell containing your DNA.... I start with the same letter as one of the particles I contain.
What is the nucleus?
400
I am the racetracks that electrons zoom around outside of the nucleus of an atom.
Hint: Electrons orbit the nucleus much like the planets orbit the sun.
What are orbital shells
400
You can find me by adding the number of protons and neutrons an atom has.
Hint: We use a triple beam balance to find the...... of an object.
What is the atomic mass?
500
I am the building block of all matter. I contain protons, electrons, and neutrons.
Hint: no hint, I think you all know this!!!
What is an atom?
500
I am a pure substance- all the atoms of me have the same atomic number (number of protons).
Hint: you find me listed on the periodic table.
What is an Element?