ATOMIC NUMBER AND PERIODIC TABLEMS. MILLIMET

8/20/2014

ENTRANCE PROCEDURE• Walk in classroom silently

• Pick up papers that you need from side table then walk to your seat (Keep walking forward, do not turn around)

• Check board and Sit down at your desk. 1. Write down homework in your planner.

2. Take out have-outs: Science Study Buddy Binder, Pen/ Pencil

3. Put homework in the top of the table if homework due that day

4. Start DO First

• 5 minutes to work on do first, silently and independently

DO FIRST ANSWERS

  Mass?Electrical Charge?

Location in Atom?

Electron

 0 (1/1836

AMU) Negative   Electron Cloud

Proton  1 AMU Positive  Nucleus

Neutron  1 AMU

Neutral (No Charge)  Nucleus

Compared to the charge and the mass of an electron, a proton has –A. The same change and a smaller massB. The same charge and the same massC. An opposite charge and a larger massD. An opposite charge and a smaller massE. A neutral charge and the same mass

OBJECTIVE

• SWBAT determine the identity of an element using its atomic number and the periodic table

•WHY??

• Allows us to understand why different materials look and act differently in nature.

• Basis of all chemistry

• Will allow us to be able to draw models of atoms for different elements by the end of the week!

ELEMENTS IN PERIODIC TABLE

• An ELEMENT is a substance that is made up of all the exact same type of atom.

• Each element is made up of different types of ATOMS with different properties.

• We can tell types of atoms or elements apart by the number of PROTONS

• Each type of atom has a certain number of PROTONS, giving them different properties, masses and sizes.

BIG IDEA: Because each atom, and element, has a certain number of protons – We can DETERMINE an element or type of atom by the number of protons

ATOMIC NUMBER

• The Atomic Number of an element = number of protons

• Periodic Table is ordered by atomic number, and therefore is ordered by the number of protons an element has!

THE ATOMIC NUMBER ALWAYS TELLS US: IDENITY OF ATOM AND # OF PROTONS

Element Name (type of atom)

HOW CAN WE IDENTIFY ELEMENTS OR TYPES OF ATOMS?

• To determine an element by the number of protons:

1. Look at the number of protons.

2. Find the Atomic number that matches protons on periodic table.

3. Find element name that matches atomic number

•  

• To determine the number of protons in a given element:

1. Find element on periodic table.

2. Find atomic number on the square for the element.

3. Atomic number = number of protons!

TRY IT! - ANSWERS1. How many protons are in an atom of nitrogen? 7

2. What is the atomic number of carbon? 6

3. What element has an atomic number of 5? Boron (B)

4. What element/type of atom has a 3 protons? Lithium (Li)

5. What element/type of atom has 17 protons? Chlorine (Cl)

6. I have an aluminum can of diet coke. It is made of millions of aluminum atoms.

What is the atomic number for aluminum? 13

How many protons are in 1 atom of aluminum? 13

7. have a solid gold bracelet. It is made of millions of gold (Au atoms).

What is the atomic number for gold? 79

How many protons does 1 atom of gold have? 79

ATOMIC BINGO!!

• Listen carefully as your teacher reads out clues that match with each element. Cross off to cover up an element that your teacher calls.

•Yell out BINGO to signal to your teacher that you would like them to come check to see if you were correct.

•Remember, BINGO can be achieved by getting 5 spaces in a line covered (horizontally, vertically, or diagonally).