Particle Structure
True or False: Elements can exist as single atoms or in molecule form
True (O2, Na, Au, N2)
Which element makes up 78% of our air?
(Hint: its not Oxygen)
Nitrogen
Is ripping a piece of paper a Chemical or Physical Change?
Physical Change
_____________ take the shape of their container
Liquids or Gasses
An atom is the smallest unit of an ____________.
Element
A ______________ is a substance that is composed of 2 or more types of atoms
Compound
Elements are organized on the table by their ______________.
Properties
A change in a substance that affects a substance's chemical makeup
Chemical Change
True or False: Solids have an indefinite shape and volume
False
Anything that has mass and takes up space is _____________.
Matter
Single atoms by themselves can only ever be ____________.
Elements
What is the name for the 18 columns of elements that share properties with each other?
Groups
(Periods are the side to side rows)
A change in substance that does not affect the substance's chemical makeup
When we saw dry ice sublimating we were watching it change from a ___________ to a ___________.
Solid to a Gas
What is the difference between mass and weight?
Mass is a measure of how much matter something is made of.
Weight is the relationship between an object's mass and the gravity pulling on that mass
What is the difference between a compound and a mixture?
Mixtures are anything that are made of more than one substance. (Air, soup, milk)
Compounds are pure substances that are made of more than one type of atom (H2O, CO2)
Which family on the periodic table is known for being stable and does not bond?
Noble Gasses
The Law of Conservation of Matter states that...
Matter cannot be created or destroyed
What happens to the molecules of a substance if you heat it up?
They spread apart and begin to move faster (gaining energy)
What is a "Chemical Symbol"?
Sometimes, substances can bond together in a large and regular pattern. Graphite is an example of this. What is this called?
Extended Structure
What does the atomic mass of an element roughly equal to?
The number of protons and neutrons in an atom
Photosynthesis is the process by which plants use water (H2O) and Carbon Dioxide (CO2) to make glucose (C6H12O6) and __________ which is released as a waste product.
Oxygen (O2)
What are two properties of gases?
1. Gasses have mass, weight and volume
2. Gasses have no definite shape (shape of the container)
3. Gasses have no definite volume (Fill the whole container)
What is the word that can be used interchangeably to refer to either a molecule or an atom?
Particle