Atomic Theory
What are the 3 subatomic particles that make up an atom?
Protons, neutrons, and electrons
True or False: Scientific Theories are often discarded
False: Scientific theories are modified and rarely discarded
Are the attractions between particles stronger in solids or gases?
Solids
Is copper an atom or an element?
element
What is the Density of the object if it has a mass of 10g and a volume of 10L
1g/L
Which subatomic particle has a negative charge?
Electron
What do scientists call an educated guess during an experiment?
A hypothesis
When a solid substance is melted down, what happens to the attractions between the particles?
The strength of the attractions decreases
Which 2 subatomic particles affect the net charge of an atom?
Protons and Electrons
What is the density of a rock on the moon that has a mass of 20g and a volume of 5L
4g/L
What subatomic particle has a neutral charge?
Neutron
What would cause a scientific theory to be modified?
New evidence collected
What can a scientist do to change the phase of a specific type of matter from a solid to a liquid?
Increase the temperature
Which 2 subatomic particles mostly affect the mass number of an atom?
Protons and Neutrons
What is the volume of a rectangular prism with a length of 20cm, a width of 5cm, and a height of 10cm?
1000L
Where do the electrons reside in an atom?
The outer shell
Name this theory
Life exists because of cells
Cell Theory
What affects weight but doesn't affect mass?
Gravity
Which 2 subatomic particles affect the stability of an atom?
Protons and Neutrons
What is the mass of an object that has a density of 50g/L and a volume of 25L?
1250g
What do you call 2 or more atoms grouped together?
A molecule
What is the name of Galileo's theory that the sun is the center of our solar system?
Heliocentric theory
Name 3 properties of matter that would be the same on the moon and on the Earth?
mass, density, and volume
What do all the elements on the farthest right-side column have in common?
They are all gases
The Grapefruit in the bowl has a mass of 250g and a density of 60g/L. What is the volume?
4.17L