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100
Each element has one or two-letter __________ __________ that represent the element's name
chemical symbol
100
A particle in the nucleus of an atom that has no charge
neutron
100
A chart that arranges all the known elements by their properties
periodic table
100
Two or more atoms joined together is a ___________
molecule
100
A useful representation of something that aids in studying the subject further
model
200
A substance that is made up of only one particular type of atom and cannot be broken down into simpler substances
element
200
____________ is anything that has mass and takes up space
Matter
200
A product is a substance that is __________ by a chemical reaction
produced
200
A molecule that consists of two or more different elements
compound
200
The central core of an atom
nucleus
300
The application of knowledge to accomplish a goal is known as ____________
technology
300
A particle outside the nucleus of an atom that has a negative charge
electron
300
Matter undergoes both ____________ and _____________ changes
physical, chemical
300
A group of chemical symbols and numbers that describes the type and numbers of elements present in a molecule
chemical formula
300
A particle in the nucleus of an atom that has a positive charge
proton
400
The three most common known states of matter are __________, _________, and ________
solid, liquid, gas
400
Density is the measure of how ____________ matter is
compact
400
Matter has two different kinds of properties: ________ and ___________
physical, chemical
400
The ____________, _____________ and _____________ in an atom determine its properties
electron, protons, neutrons
400
A chemical property is a property that describes matter's ability to change into different ____________
substance
500
Physical properties include size, color, shape, ___________ and _________________
state, density
500
The rearrangement of __________ within __________ to make new molecules with different properties is known as a chemical reaction
atoms, molecules
500
All matter is formed from ___________ elements or ____________ of elements
single, combinations
500
A reactant is a substance present at the start of a _____________ ______________
chemical reaction
500
The type and arrangement of ____________ give matter its ______________
atoms, properties