1. Notes Atoms (Part 1):  All matter is made up of atoms  Matter is anything that is a solid, liquid, or gas  The different types of atoms are called elements  We once thought atoms were the smallest particles, but we now know there are even smaller particles (sub-atomic particles)  Atoms are made of 3 sub-atomic particles… …protons (are the blue circles) …neutrons (are the green circles) …electrons (are the orange circles) SPI 0807.9.1 Atoms Here is a model of one atom PRESS THE RIGHT-ARROW BUTTON ON YOUR KEYBOARD TO ADVANCE THROUGH THE PRESENTATION

2. BB elow is a model of one beryllium atom NN otice that is has 4 (blue) protons SS o the atomic number is four NN otice that it also has 4 (orange) electrons Legend =protons =neutrons =electrons SPI 0807.9.1 (Atoms) Notes 1 2 3 4 1 2 3 4

3. A)What is this element’s atomic number Write it down! ANSWER: Atomic number is 3 because it has 3 (blue) protons SPI 0807.9.1 (Atoms) SPI 0807.9.9 (Per Table) 3 Li Lithium 6.9 Notes HINT: Look at the top/right of p286 to see how to read the periodic table. HINT: The atomic number is the number of protons!

4. A)What is this element’s chemical symbol Write it down! ANSWER: Chemical symbol is Li SPI 0807.9.1 (Atoms) SPI 0807.9.9 (Per Table) 3 Li Lithium 6.9 Notes HINT: Look at the top/right of p286 to see how to read the per table

5. A)What is this element’s name? Write it down! ANSWER: Element name is lithium SPI 0807.9.1 (Atoms) SPI 0807.9.9 (Per Table) 3 Li Lithium 6.9 Notes HINT: Look at the top/right of p286 to see how to read the per table

6. A)What is this element’s atomic mass. Write it down! ANSWER: Atomic mass is 6.9 SPI 0807.9.1 (Atoms) SPI 0807.9.9 (Per Table) 3 Li Lithium 6.9 Notes HINT: Look at the top/right of p286 to see how to read the per table