The Periodic Table
What are the rows (left to right) called on the periodic table?
periods
Where are the electrons located in an atom?
in the electron cloud
Describe the atoms/particles in a solid.
They are close together.
What does the coefficient tell you?
How many molecules you need of that compound.
What type of change alters the form but not the identity?
physical change
What are the columns (up and down) called on the periodic table?
groups or families
Where are the neutrons located in an atom?
in the middle (nucleus)
Describe the atoms/particles in a liquid.
the shape changes
What is the subscript in the chemical formula for water? H20
2
In what type of change does the chemical formula stay the same?
physical change
What is the number in the top left corner called?
the atomic number
Where are the protons located in an atom?
In the middle (neucleus)
Describe the atoms/particles in a gas.
takes the shape of the container.
What is the coefficient in this formula:
3CH
3
What is the physical change occurring in breaking glass?
Size and shape
What are the letters (like K, Ca, Mg, etc.) called?
Element Name
What charge does a proton have? Positive or negative?
positive
Describe how density affects an object when you put it in water.
Dense objects sink, objects that are not dense float.
What does the subscript tell you?
How many atoms you need of that specific element.
What type of chemical changes are occurring in burning wood? Give 2
temperature, color, light, odor
Explain how to find the number of NEUTRONS in an element.
Atomic number rounded, minus the number of protons.
What charge does an electron have? Positive or negative?
negative
All matter is made up of ______.
Atoms
In an ionic bond, what is transferred from one atom to another?
neutron, electron, proton
electron
Iron rusting is what type of change?
chemical