Hydrogen

Helium

Lithium

Beryllium

Boron

Carbon

Nitrogen

Oxygen

Fluorine

Neon

Sodium

Magnesium

Aluminum

Silicon

Phosphorus

Sulfur

Chlorine

Argon

Potassium

Calcium

Gallium

Germanium

Arsenic

Selenium

Bromine

Krypton

Rubidium

Strontium

Yttrium

Zirconium

Silver

Cadmium

Tin

Antimony

Tellurium

Iodine

Xenon

Cesium

Platinum

Gold

Mercury

Lead

Bismuth

Francium

Radium

Uranium

Fe - 56

Democritus (3-4000 BC)

indivisible

John Dalton

JJ Thomson

Ernest Rutherford

most of the atom is empty space and the majority of the mass is located in a small, dense region

the number of protons and neutrons in an atom

Bohr model

It is a change within the atom, a change within an atom's nucleus

Atoms of the same element with different numbers of neutrons

A charged particle produced by the loss or gain of electrons.

breaking or forming bonds between atoms

loss of an alpha particle

Two neutrons and two protons, the same as a helium nucleus

Electrons were deflected away from negatively charged plate (cathode) and towards

Henry Moseley

equal

identical

isotopes

1/12th of a carbon-12 atom

the weighted average of the masses of an element's isotopes

energy that is radiated or transmitted through space in the form of rays, waves, or particles

The process in which unstable isotopes decay into other elements and emit radiation as they attempt to become more stable

late 1800s

A way of showing radioactive decay by using element symbols

Earth, Fire, Air, and Water

one proton and one electron

neutral

polar

the pnictogen group

elements of the pnictogen group

the chalcogens group

elements of the chalcogens group

the halogens group

elements of the halogens group

the noble gases

elements of the noble gases

the Lanthanide series (Lanthanides)

the Actinide series (Actinides)

number of valance electrons

energy shells

Matter

A solid

incompressible

A liquid

incompressible

expand

heated

a gas

compressed

Vapors

a physical property

physical properties

Extensive properties (Ex: mass, length, volume)

independent Ex: Density

Intensive properties Ex: Density

intensive

chemical property

physical change

phase change

A chemical reaction(or chemical change)

reactants

products

The law of conservation of mass (mass of reactants = mass of products)

a mixture

a heterogeneous mixture Ex: salad dressing

A homogeneous mixture, also referred to as a solution Ex: silver mercury amalgam

A suspension

Colloids

smoke

the breakdown of a neutron into a proton and an electron

Gamma waves, or electromagnetic radiation that are released by the nucleus

an electron

positive electron

The splitting of an atomic nucleus

Beta decay, breakdown of a neutron into a proton and an electron

Slamming a particle into an atom

Californium

Thallium

the location of stable nuclei on a neutron-vs.-proton plot

Radon

a method to convert one different type of unit to another

10⁻¹² meters

10⁻⁹ meters

10⁻6 meters

10⁻3 meters

10⁻² meters

10⁻1 meters

10 meters

10² meters

10³ meters

10⁶ meters

10⁹ meters

10¹²

1 dm ³

add 273°

a mixture of metallic elements