Law of Conservation of Matter
Physical/
Chemical Changes
Unit 1

Periodic Table
Unit 2
100
Matter cannot be created or destroyed. It can only change form.
What is the law of conservation of matter?
100
Melting ice is an example of what type of change?
What is a physical change?
100

Elements that run vertical? What do they have in common?

 What are groups? The same amount of valence electrons

100
This number tells you the number of protons.
What is atomic number?
100

the formation of a new substance with different properties; cannot be undone by physical means

What is a chemical change?

200
Mass of __________ must equal the mass of _________.
What is reactants and products?
200
Boiling water is an example of what type of change?
What is physical change?
200

Reactivity travels this way on the periodic table.

What is to the left then down? 

The most reactive elements are in the bottom left hand corner! 

200
How many valence electrons(electrons in it's outer ring)does oxygen have?
What is 6 valence electrons?
200

a representation of a molecule or compound in which the elements are represented by their symbols and subscripts represent the number of atoms of each element

What is a chemical formula?

300
4P + 5O2 --> 2P205 20g 40g ?
What is 60g?
300
Burning paper is an example of what type of change?
What is chemical change?
300

The three parts of an atom and their sizes

What are protons, electrons, and neutrons? Protons and Neutrons are 1 amu making up most of the weight. Electrons are 0 amu. 

300
What is the formula for finding the number of neutrons?
What is round the atomic mass minus the atomic number?
300

the number placed in front of a chemical formula in a chemical equation; represents the number of molecules of that substance

What is a coeffiecent?

400
____H2 + O2 --> 2H20 When this equation is balanced, what will be the coefficient infront of the ____H2?
What is 2H2?
400
A rusting bike is an example of what type of change?
What is chemical change?
400

The most mass in an atom

What is the nucleus?

400

What are the three major categories of elements and where do you find them on the periodic table?

What are metals (left of zigzag), metalloids (on staircase) and Nonmetals (right of zigzag)

400

substances that are combined and changed during a chemical reaction

What is a reactant?

500
You have 10g of wood. After burning the wood, you are left with 5g of ashes. What has happened to the rest of the rest of the wood?
What is 5g of gas?
500

What are the 6 clues of a chemical change?

What is color change, smell, light, temperature change, gas formation, and formation of precipitate?

500
I am an element with 14 protons and 15 neutrons. What type of electrical charge do I have?

Can not determine with this information. Electrons and protons are needed to determine the electrical charge. 

500
How man energy shells(levels) does Na(sodium) have?
What is 3 energy shells(levels)?
500

the formation of solids from a solution (a new substance)

What is precipitate?

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