Matter
Anything that mass and takes up space.
Matter
Define atom.
The building block of matter
Define element.
Substance made up of only one kind of atom.
What is the formula for density?
D=M/V
Who invented the Periodic Table?
Dmitri Mendeleev
What is a physical change?
Change of size, shape, or form
Define proton.
Particle in nucleus with positive charge
What is the Atomic Mass?
The weight of an element
A substance that is both a liquid and solid at the same time.
Colloid
How many periods are there on the Periodic Table?
7
What is a chemical change?
A new substance is formed
What does the Greek word 'Atomos' mean?
Uncuttable
What helps elements combine into molecules or compounds?
Chemical Bonds
Give an example of a physical change.
Change size, shape, form
How many groups are there on the periodic table?
18
Name the 4 states of matter
Solid, Liquid, Gas, Plasma
Particle in the nucleus with a neutral charge.
Neutron
The number of protons an element has also tell us the __________ number on the periodic table.
Atomic Number
Give an example of a chemical change.
New substance is made, with new characteristics
How are the elements on the periodic table organized?
Chemical properties
How do the particles move?
Solid- Vibrate
Liquid- Slide
Gas- Bounce
Where are electrons located and what charge do they have?
Orbit outside of nucleus, negative
What are the 3 ways elements can be combined?
Molecules, compounds, mixtures
What is the difference between a compound and a mixture?
C= Set ratio, new substance, new characteristics, chemically combined
M= No set ratio, individual substances keep own characteristics, not chemically combined
What are the 3 categories that all elements fall into?
Metals, Nonmetals, Metaloids