1. Chapter 2 Chemistry of Life

2. ProtonsNeutronsElectrons Location (within an Atom) Charge (neutral, positive or negative) Relative Atomic Size (largest, smallest…?) Complete the Table in Your Notes

3. Unless told otherwise atoms are neutral.  What does this tell you about the number of protons, neutrons and electrons?  Protons = electrons  Number of neutrons can vary (they do not contribute to the charge) “Anatomy of an Atom”

5.  Atoms of same type have same number of protons! (it’s what makes an atom, an atom!)  All oxygen atoms have 8 protons  Can have different number of neutrons  Isotopes of the same element  Carbon-12 isotope versus Carbon-14 isotope --> Carbon-14 has TWO more neutrons Nucleus Consists of Protons and Neutrons held together by nuclear force.

6.  Found in energy levels around the nucleus  They are about 2,000 times smaller than protons or neutrons!  If an atom loses an electron, it will become positively charged.  If an atom gains an electron, it will become negatively charged.  We call these charged atoms ions. Electrons

8.  Tells number of protons (and electrons)  Use mass number to determine number of neutrons. Periodic Table

9. How many protons, neutrons and electrons?

10.  Why do atoms undergo bonding to form compounds?  To be stable and have a complete outer electron shell (energy level)  Ways to bond:  Share electrons  Give electrons  Take electrons Chemical Bonding

11. With your partner get: 19 pinto beans 19 popcorn kernels (each) and 24 red beans-DO NOT EAT THESE!!   Red beans = neutrons  Pinto Beans = protons  Popcorn kernels = electrons Use the Above to represent the nucleus of the following atoms:  Carbon-12  Carbon-13  Carbon-14 Arrange in energy levels: 2, 8, 8, 18… Use paper template…Do not Write on it!

12. When one or more electrons are transferred from one atom to another.  Like with Na and Cl  Forms charged atoms or IONS Ionic Bond

14.  Mg (atomic number = 12) bonds with Cl Show what would happen when….

15.  Electrons are shared between two atoms. Ex: Cl 2 Covalent Bond

16. Show covalent bonding in water (H 2 O)

18.  Inter= between (think interstate)  Attraction between molecules  Why we have liquid water and it isn’t all gas.  Forces hold neighboring water molecules together Intermolecular forces