Show:
PHYSICAL & CHEMICAL CHANGES
ELEMENTS
MATTER
BONDS
VOCABULARY
100
If a bike left outside in the rain makes the bike rusty, is it a physical change or chemical change and why?
Rust is a chemical change because the bike cannot be changed back to not being rusty.
100
What is the chemical symbol for Iron?
The symbol is Fe.
100
Explain what matter is AND name the three states of matter.
Matter is anything that has mass and takes up space. The 3 states of matter are solid, liquid, and gas.
100

Matter is composed of smaller units called _________. 

Molecules

100

What is the word for when a solid changes to a liquid?

Melting

200
When water freezes to make ice. Is this a physical or chemical change? Explain your answer.
It is a physical change because the water is changing its state of matter; it is changing from a liquid to a solid.
200
What is the symbol for Helium and how is Helium used?
The symbol for Helium is He. Helium is most commonly known for being used to fill balloons to make them float. It also has uses in deep sea diving, welding, and filling blimps
200

Electrons are located in the ___________.

Electron Cloud

200

True or False? Protons and Electrons are locate in the middle of an atom. 

False. Protons and Neutrons 

200

What is the units of measure of atomic weight? 

Atomic mass unit

300
I took a piece of paper and rolled it up into a ball. Is this a physical change or chemical change. Explain your answer.
It is a physical change because a new substance is not formed. It is just changing its shape. There is no new odor, color or other reaction that occurred.
300
What is an element? Give an example of one element.
An element is one type of pure substance found on the Periodic Table. An example of an element is Hydrogen (H).
300

The number of an atom's protons is equal to the number of its _______. 

Electrons

300

A bond forms when two atoms share _________. 

Electrons

300

What is the "sentence" below called? 

Na + H2O ---> NaOH + H2

A Chemical Equation

400

What are three signs a chemical change is occurring?

-Odor -New color -Creates bubbling -A new substance is formed

400

How do you find the atomic weight of an element?

The atomic weight is equal to the number of an element's protons plus the number of its neutrons. 

400
What are two ways that the states of matter (solid, liquid and gas) are all similar (the same).
-They are all made of particles -They all have mass -They all have volume
400

What holds one atom to another in a molecule? 

A Chemical Bond

400

What is the difference between a physical and chemical change? 

Physical Change -> Matter involved in the change is chemically the same kind of matter after the change

Chemical Change -> Matter involved in the change is chemically different matter after the change

500
Is lighting a match a physical or chemical change? Explain your answer.
Lighting a match is a chemical change because there is a new odor, a change of color, and the burnt match cannot be changed back.
500

How many neutrons does atomic number 35 have?

35 - 17 = 18 neutrons

500
Is water (H2O) an atom or a molecule? Give one reason for your answer.
It is a molecule. H2O is more than two atoms that are bonded together, which forms a molecule
500

Which type of bond is stronger? Double or Single Bond? 

Draw an example. 

Double

500

What is the orderly arrangement of all 118 elements according to the atomic number? 

Periodic Table of Elements