Atomic theory
Who discovered the atom?
Dalton
What element has the mass of 12.0
Carbon
List the 3 phases of matter.
Solied
liquid
gas
Matter is made up of small ______.
Particles
_____ Is the measurement of the amount of matter?
Mass
Who discovered the cathode ray?
Thomson
What is the atomic number of krypton?
36
Whats the difference between steam and water vapour?
You can see steam but you can't see water vapour
What are particles always doing?
Moving
Atoms can combine to form molecules?
True or False
True
Who is known as the "Father of atomic theory?"
John dalton
Whats the 18th element on the periodic table?
Calcium
Gases take up the _____ and _____ of a container?
Volume and shape
What is between all particles?
space
Oil floats on water, why?
Oil has a lower density than water which makes it float
Before drawing a Bohr model what do you need to find first?
Protons , electrons , neutrons
What way do periods go?
left to right
What is absolute zero?
When molecules stop moving
What does K.M.T relate to?
States of matter
A rock sinks in water and a piece of wood floats, which one has a higher density?
The rock because it sinks
What year did John Dalton discover the atom?
1803
What way do groups run?
up and down
What is needed to change the phases of matter?
Adding or removing energy
Particles move slower in smaller spaces?
True or False
True
To calculate the density of an object or liquid you need to know the _____ and ____.
Mass and Volume