Chemistry

Large region outside of an atom containing electrons.

A mixture where the components are not uniform

A rapid spinning of liquids causes them to separate out by their mass

Signs of a chemical reaction:

A compound is one atom bonded to itself

Process that leads to the transformation of one set of chemical substances to another

The dense center of the atom containing protons and neutrons

Occur when atoms share electrons between each other

Periodic table- elements based on atomic number, electron configuration and chemical properties

Creation of a solid in a solution during a chemical reaction

Occur when atoms gain/lose electrons, and then bond due to a magnetic attraction

A measure of mass per unit of volume.

An element is a single atom by itself

The smallest unit of matter that contains two basic parts

The number of protons and electrons in the atom

Negatively charged particles found in the electron cloud.

In the bohr model there are __ electrons in the first shell and __ electrons in the second

Conducted his famous “gold foil” experiment to revolutionize the theory of atomic structure

A substance that contains only one thing

Physical reactions occur when bonds between atoms are broken and reformed.

Russian Chemist who formulated periodic law and created the first version of the periodic table

A mixture where the components that make up the mixture are evenly distributed throughout

Electrons that rest in the outer most energy level of an atom

Used to separate homogenous liquids by removing the water through evaporation

Used to separate liquids from solids by pouring them through an appropriate filter

Positively charged particles found in the nucleus

A way of showing atomic structure with electrons in different energy levels