Mixture and Pure substance
What are the 3 main states of matter?
Gas, Solid, Liquid.
This smallest particle of an element that retains the properties of the element is called an_____.
atom
What is a chemical bond?
The force that holds two atoms together.
The chemical bond that results from sharing valence electrons is a ______.
covalent bond
What is a chemical change?
a process involving one or more substances changing into a new substance
What is the form of matter that has its own definite shape and volume?
solid
A positively charged particle is called a____.
proton
What is a positively charged ion?
cation
A ______ is formed when two or more atoms bond covalently.
molecule
what is a reactant?
the starting substance
What is the form of matter that flows, has constant volume,and takes the shape of its container?
Liquid
A negatively charged particle is called a ___.
electron
What is a negatively charged ion?
anion
Single covalent bonds are also called_____.
sigma bond
What is products?
the end substance
What is a form of matter that not only flows to conform to the shape of its container but also fills the entire volume of its container?
gas
neutron
The electrostatic force that holds oppositely charged particles together in an ionic compound is referred to as an _____.
ionic bond
what type of bond forms when parallel orbitals overlap and share electrons?
pi bond
A ________ is a statement that uses chemical formulas to show the identities and relative amounts of the substances involved in a chemical reaction.
chemical equation
What is a characteristic that can be observed or measured without changing the sample’s composition?
physical property
Who discovered that empty space cannot exist?
Aristotle
Compounds that contain ionic bonds are____.
ionic compounds
An ___________occurs when a greater amount of energy is required to break the existing bonds in the reactants than is released when the new bonds form in the products.
endothermic reaction
A _______ in a chemical equation is the number written in front of a reactant or product.
coefficient