1. An element has 4 protons, 5 neutrons, and 5 electrons.
Bell Work:
An element has 4 protons, 5 neutrons, and 5 electrons.
What’s the atomic mass number?
How many valence electrons are there?
Is it an ion or neutral atom?

2. Preparing for TCAP… SPI 0807.9.1
What do the following items have in common?
Magnifying glass, Paper airplane, Cup of Soup
SPI
It takes a _________ change to create a compound.
SPI
The periodic table is arranged according to the elements’ ___________ number.
Made of Atoms
chemical
atomic

3. I can… Tell the difference between the atomic number and mass number.
Find the number of protons, neutrons, and electrons in an atom.
Determine which elements will bond together based on their valence electrons.
Identify the difference between an ion and an atom.
Differentiate between positive and negative ions.

4. Let’s review…
Which of the following is an ion?

5. Which of the following describes an ion of Lithium ?
Lithium lost 2 electrons.
Lithium gained 2 electrons.
Lithium transferred its electrons to another.
Lithium lost 2 protons. -2

6. Which of the following would form an ionic bond?
Sodium and Oxygen
Nitrogen and Oxygen
Calcium and Fluorine
Sodium and Fluorine

7. Covalent Bonds Today’s Goal…
Understand the difference between an ionic bond and a covalent bond.
Understand the interaction between nonmetals.

8. Chemical Bonds Ionic Bond Covalent Bond Electrons are transferred.
Metals to Nonmetals.
Valence e- = 8
Electrons are shared.
Nonmetals to nonmetals.
Strongest bonds.

9. Ionic or Covalent? Sodium and Chlorine Magnesium and Oxygen
Carbon and Nitrogen
Nitrogen and Oxygen
Scandium and Nitrogen
Phosphorus and Sulfur
Iodine and Hydrogen
Calcium and Oxygen
Ionic
Ionic
Covalent
Covalent
Ionic
Covalent
Covalent
Ionic

10. Lewis-Dot Structures
Simple way to show how the valence electrons are arranged

11. Now you try…
Helium
Sodium
Carbon
Nitrogen
Lithium
Argon