1. Creating a Positive Learning Environment for Everyone
Be respectful of your classmates
Save conversation for clicker portions of lecture
Put cell phones in “airplane” mode
Turn off tablets
Close laptops

2. Announcements
Lab tomorrow! Must have lab apron and goggles! Must follow proper safety procedures and dress code. (state law)
LON-CAPA HW #1 (Type 1) due tonight by 7:00pm
LON-CAPA HW #1 (Type 2) due tomorrow by 7:00pm
Pre-lecture Assignment 2 due Thursday by 8:00 am
Textbook homework and lab write-up due Friday in discussion

3. Clicker #1 Which of the following best describes the substance XeF4?
I. Element
II. Molecule
III. Compound
IV. Heterogeneous mixture
V. Homogeneous mixture
A) III only
B) I, II
C) II, III, IV
D) II, III, V
E) II, III
Element – cannot be broken down into simpler substances
Molecule – two or more atoms joined together and acting as a unit
Compound – composed of two or more different elements
Mixtures – two or more pure substances acting “independent” of each other (not reacting)
Pure substance – has constant composition; can be an element or a compound
Heterogeneous mixture – has different properties from those of other regions (e.g., oil/vinegar dressing)
Homogeneous mixture – same throughout (e.g., sugar water)

4. Dalton’s Theory All matter is made of atoms.
Atoms of the same element are the same (atoms of different elements are different).
Atoms are indestructible. Chemical reactions are rearrangements of atoms.
Compounds are combinations of atoms.

5. Clicker #2
Which of the following statements regarding Dalton’s atomic theory are still believed to be true?
I. Elements are made of tiny particles called atoms.
II. All atoms of a given element are identical.
III. A given compound always has the same relative
numbers and types of atoms.
IV. Atoms are indestructible.
A) I only
B) I, II, III
C) I, III
D) II, III, IV
E) II, IV

6. Clicker #3 Dalton’s theory does not explain:
A) why water is “sticky” (attracted to itself).
B) why some elements are diatomic.
C) why elements have different reactivities.
D) why some elements or compounds conduct electricity.
E) any of the above.

8. Clicker #4
How many of the following are true regarding the number of protons in an atom?
I. Identifies the element.
II. Gives the number of electrons in a neutral atom.
III. Gives the number of neutrons in a neutral atom.
IV. Tells the element’s atomic number.
A) 0
B) 1
C) 2
D) 3
E) 4

9. Periodic Table
Symbol, name, number of protons (all of these are related)
Number of electrons in a neutral atom
Metals and non-metals
Charges for common ions (when forming compounds)

10. Periodic Table

11. Periodic Table

12. By the Exam… Know the polyatomic ions and charges (Table 5.4).
Know common ions and symbols (Tables 5.1 and 5.2). The charges for these come from the periodic table.
Know prefixes (Table 5.3).

13. Some Polyatomic Ions (Memorize! Table 5.4 pg. 101)
Ammonium
NH4+
Sulfate
SO42-
Hydroxide
OH-
Sulfite
SO32-
Nitrate
NO3-
Phosphate
PO43-
Nitrite
NO2-
Phosphite
PO33-

14. Nonmetal-nonmetal Prefixes (Memorize – Table 5.3 pg. 95)1
(not first atom)
Mono 6
Hexa 2 Di 7
Hepta 3
Tri 8
Octa 4
Tetra 9
Nona 5
Penta 10
Deca