Sceince chapter 3
Terms
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- Heterogeneous mixture
- you can see its individual parts (know some examples-chocolate chip ice cream, vegetable soup. etc.)
- Law of convervation of matter
- states that matter is neither created nor destroyed, only changed in form
- Nuetron
- uncharged particle in the nucleus of an atom
- Mixtures
- formed when two or more substances come together but don't combine to form a new substance
- Nucleus
- positively charged central part of an atom
- Atomic Number
- tells you the number of protons in the nucleus of each atom of an element
- Atom
- small particle of
- Electon
- negatively charged subatomic particle
- Matter
- anything that has mass and takes up space
- Periodic Table
- list all the elements
- Isotopes
- atoms of the same element that have different numbers of neutrons
- Substance
- a sample of matter that has the same composition and properties throughtout
- Element
- matter made up of one kind of atom
- Mass Number
- sum of an atom's protons and neutrons
- Proton
- positively charged particle in the nucleus of an atom
- Compound
- a pure substance whose smallest unit is made of atoms of more than one element; elements in a compound are always combined in the same proportion. water being a excellent example!
- Isotopes
- have the same number if protons, but different numbers of neutrons
- Atomic Mass
- weighted average mass of an element
- Homogeneous mixture
- a mixture that is the same throughout-you can't see the different parts ( know some examples-air)