Atomic Structure
Makes up all matter.
What are atoms?
Pure substances composed of only one type of atom that cannot be changed into a simpler substance.
What is an element?
Contains 2 or more different atoms joined together.
What are compounds?
The father of modern chemistry.
Who is Antoine Laurent Lavoisier?
Changes that occur when appearances change but substances don't. (Boiling, melting, breaking, cutting)
What are physical changes?
Located in the nucleus and have a positive charge.
What are protons?
He is credited with the basis of the modern periodic table and correctly predicted properties.
Who is Dmitrimendeleey?
2 or more elements and compounds mixed not chemically combined.
What is a mixture?
On the left side of the arrow in chemical equation.
What are reactants?
The bubbles inside boiling water are composed of?
What is water vapor?
Have a neutral charge and located in the nucleus.
What are neutrons?
The current amount if elements on the periodic table.
What is 118?
Made of one kind of atom and found on the periodic table.
What is a element?
When the form of this is changed, the total mass remains the same.
What is matter?
Changes that occur when you have a substance change. (Bubbles, cloudy, temperature changes, color changes)
What is a chemical change?
Located in energy levels outside the nucleus and has a negative charge.
What are electrons?
Represents the number of protons in an atom of an element.
What is the atomic number?
A mixture that is uniform throughout the mixture.
What is a homogenous mixture?
Can never be created or destroyed.
What is mass?
Mixing two chemicals together produce a color change.
What is a chemical change?
Electrons located on an atoms outermost energy level that determine how atoms will bond with other atoms.
What are valence electrons?
Mass of one atom of the element, roughly equal to the number of protons and number of neutrons.
What is the atomic mass?
A mixture that is not evenly mixed throughout.
What is a heterogeneous mixture?
This kind of system should be used when studying chemical reactions.
What is a closed system?
To balance a chemical equation, this can be changed.
What is the coefficient?