Announcements Online HW #2 Lab write-ups must be your own.

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Presentation transcript:

Announcements Online HW #2 Lab write-ups must be your own. Type 1 due Monday, 9/9, 7:00pm Type 2 due Wednesday, 9/11, 7:00pm Lab write-ups must be your own. What to memorize for exam.

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).

Periodic Table +1 +2 -3 -2 -1 +3 varies +1

Clicker #1 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

Clicker #2 What is the average mass of one hydrogen atom? A) 1.008 amu B) 1.008 g C) 1.008 moles D) Both A and B are correct.

Clicker #3 How do these two numbers compare? A) # of H atoms are less than the # of C atoms B) # of H atoms are equal to the # of C atoms C) # of H atoms are greater than the # of C atoms D) I have no clue. Help!