Atomic Theory l Matter is composed of tiny

Atomic Theory l. Matter is composed of tiny building block or particles, called ATOMS. l. Atoms are composed of three types of subatomic particles: PROTONS, NEUTRONS, and ELECTRONS. Lecture. PLUS Timberlake 1

Subatomic Particles Particle Symbol Charge Relative Mass 0 Electron e- -1 Proton p+ +1 1 Neutron n 0 1 How big are electrons compared to protons and neutrons? See Scaling the Universe: http: //primaxstudio. com/stuff/scale_of_universe/ Lecture. PLUS Timberlake 2

Location of Subatomic Particles Protons and neutrons are located in the atom’s NUCLEUS. Electrons are found in a cloud surrounding the protons and neutrons. Lecture. PLUS Timberlake How far away are the electrons? 3

How many types of atoms are there? Lecture. PLUS Timberlake 4

Did I Get It? 1. All matter that exists in the universe is made up of _________, which are the smallest units of matter. 2. The different types of ________ are called __________. We know of about 118 of these, and we keep track of them in the _______________________. Lecture. PLUS Timberlake 5

How to read the Periodic Table Pick one of the boxes from the Periodic Table of Element and re-draw it here. Lecture. PLUS Timberlake 6

Atomic Mass on the Periodic Table 11 Atomic Number Symbol Atomic Mass Na 22. 99 Lecture. PLUS Timberlake 7

Elements Atoms of the same type can combine to form ELEMENTS. Au atoms combine to form gold Ag atoms combine to form silver Lecture. PLUS Timberlake 8

Atoms and molecules Single atoms can share or trade electrons to form BONDS. Two or more atoms bonded together is called a MOLECULE Lecture. PLUS Timberlake Atom Bond Molecule 9

Where all the Elements organized into one handy place? Lecture. PLUS Timberlake 10