Physical vs. Chemical
The substance has changes in states of matter, form, shape or size.
Define the periodic table
A table of elements.
True or False. If a chemical reaction has occurred, you have observed a chemical change.
True
Define an atom
The smallest unit
The periodic table names various elements. What are the horizontal rows called?
Periods
Define a chemical change
The substance has changes. A new substance was formed.
True or False. The periodic table contains metals and gasses only.
False- the periodic table contains metals, nonmetals and gasses.
Explain how the yeast, sugar and warm water showed a chemical change.
These ingredients caused a chemical reaction. The products were carbon dioxide and ethanol.
Protons
Positively charged
The periodic table names various elements. What are the vertical columns called?
Groups/ Families
Ice melting into a liquid (water). Physical or chemical change?
Physical
The atomic number tells us the number of ________ and ______.
Protons and Electrons.
True or False. Mixing food coloring with the water displayed a chemical reaction.
False- physical change was observed.
Neutrons
No charge/ neutral charge
What is the symbol of Salt(Sodium)?
Na
Vinegar and baking soda mixture, this produces carbon dioxide which is a gas. Physical or Chemical Reaction?
Chemical Reaction
How can you determine an elements number of neutrons?
Atomic mass- atomic number.
Chewing food to break it down into smaller units represents a _______change, but the changing of strach int sugars by enzymes in the digestive system represents a ______ change.
a. Physical, chemical
b. Chemical, physical
A. Physical, chemical
Electrons
Negative Charge
How many protons does Copper have?
29
Give an example of a physical change. Give an example of a chemical change. You may not use ice as an example.
Answers may vary.
8- protons
8-electrons
8-neutrons
Acid rain damaging a marble statue is a physical change. Think about the vinegar and egg experiment.
False- chemical change. It has rusted, or deteriorated, this shows a chemical change. We cannot g=change the statue or egg back to it's original state.
What makes up the nucleus? What makes up the electron cloud?
Nucleus- protons and neutrons
Electron cloud- electrons
What is the symbol, atomic number, number of protons, electrons and neutrons of Iron? The atomic mass is 59.
Fe- symbol
Name- Iron
Atomic number- 26
Protons and Electrons- 26
Neutrons- 59-26= 33