Quiz 3: Atomic Structure Vocabulary quiz

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Heterogeneous Mixture
This does not look the same throughout/does not have evenly distributed parts.
Atoms
Basic building blocks of all matter. These have the properties of a chemical element.
Physical Change
The matter may change its size, shape, texture, etc., but its chemical properties do not change. It may look different, but it is still the same substance you started with.
Mixture
A combination of two or more substances that are physically (not chemically) combined. Each item retains its properties and can be separated out.
Compound
are formed when two or more DIFFERENT atoms combine/bond.
Mass
The amount of matter (stuff) in an object. Stays constant (same).
Neutron
Is a subatomic particle located in the nucleus of an atom and has a neutral (or no) charge.
Boiling Point
The temperature at which a substance changes from a liquid to a gas.
Nucleus
The center part of an atom where two of the subatomic particles are found.
Extended Structures
These are made up of atoms that repeat due to the need to continue filling up the outer orbital. When they bond they make strong, solid, crystalline structures.
Homogeneous Mixture
This looks the same throughout.
Density
The amount of mass per unit of volume (ratio of mass and volume/how compact an object is).
Element
Is a pure substance made from one type of atom. It cannot be chemically broken down anymore while still retaining its properties.
Proton
Is a subatomic particle located in the nucleus of an atom and has a positive charge.
Simple Molecule
These contain a few atoms held together by covalent bonds. The outer orbitals are filled due to the bonds, so nothing else can bond to it. It is also in its simplest form and is NOT a crystalline structure.
Melting Point
The temperature at which a substance changes from a solid to liquid.
Pure Substance
A material that is only made up of one type of atom or molecule (i.e., element or compound).
Weight
The downward force exerted on an object due to gravity. Changes based on location.
Valence Electrons
The number of electrons in the outermost shell/orbital.
Chemical Change (Reaction)
When two or more substances interact and create a new substance. Signs of this occurring could be release of gas (bubbles), change of color, production of odor, release of heat and light, and production of loud sounds.
Matter
Anything that has mass and takes up space (volume). Can be a solid, liquid, or gas.
Molecule
are formed when two or more of the same or different atoms combine/bond.
Physical Property
A characteristic that describes a substance as is without changing the identity of the substance (i.e., color, density, shape, size, etc.).
Electron
Is a subatomic particle located in the area outside the nucleus in the shells/orbitals/energy levels.
Volume
The amount of space something takes up
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