Matter
What is the smallest unit of matter?
Atom
What is the center of an atom called?
Nucleus
If you have an object that is shiny and conducts electricity, what type of element would it be?
Metal
What is a heterogeneous mixture?
You can see the different parts of the mixture
What is the definition of density?
How much mass is in a given volume.
What is the shape and volume of a gas?
It does not have any shape or volume
What are the positive charges in the atom called?
Protons
Which elements are semiconductors on the periodic table?
Metalloids
What is a pure substance?
Element or a Compound
How does warm temperature affect the density of a substance?
It becomes less dense - particle spread out more
What is it called when it is only one type of atom?
Element
What is the charge of the electron cloud?
Negative
Where are the nonmetals located on the periodic table?
On the right
What can be physically separated?
Mixtures
Explain how an object can float.
The particles are less dense than the liquid.
How do the particles in a solid compare to those in a liquid?
Solids have definite shape and volume and closely packed together.
When two different atoms bond together what is it called?
A compound
If I need to use a material that will help keep food insulated, what element would I use?
Nonmetal
Which of these would be a homogenous mixture?
- Kool-aid
- Hot chocolate with marshmallows
Kool-aid
If an object is more dense what does that mean and what happens when it is placed in water?
What is it called when a solid changes into a gas?
Sublimation
What is the atomic number, and what does it represent?
The top number, and represents Protons and Electrons. (A=P=E)
What information can you find in a box on the periodic table?
The atomic number, the symbol, the name, and the atomic mass.
What is this an example of?
NaCl
(Pure substance)
Compound
How does the density of a liquid compare to the density of a gas?
The liquid is more dense than gas