Table Talk…Review from last class

How do you use the periodic table to:› Determine # of protons› Determine # of neutrons› Determine # of electrons› Determine # of energy levels› Determine # of valence electrons› Determine probable charge elements will

acquire to be stable?› Find metals or nonmetals?

Metals vs. Nonmetals

Which of the following samples would you characterize as metal or nonmetal?

Be prepared to justify your answers Samples will be projected on the doc

cam

Metals vs. Nonmetals

Metals are:› Hard and shiny› 3 or less valence

electrons› Form cations by

losing electrons› Good conductors of

electricity

Nonmetals are:› Gases or dull,

brittle solids› 5 or more valence

electrons› Form anions by

gaining electrons› Poor conductors of

electricity

Heavy Metal Lab(fill in the column headings)

1. Describe sample (luster, color, state of matter, other)2. Test for CONDUCTIVITY3. Test for MALLEABILITY 4. Test for MELTING POINT:

1. Place sample on edge (30-40 sec)2. If it melts- Low3. If it doesn’t move to

middle of hot plate4. If it melts- high

if it doesn’t – very high

HOT PLATE

Lab RolesThere is no additional lab report, just fill out the sheet I

gave you, answer ?’s on the sheet or the backFor groups of 3: PI + Recorder combined roles

Lab Roles Lab Roles

1. PI (diamond)- in charge of instructions, asking questions, only person allowed to

get sample #9 from me

3. Technician (Clubs)- tests for malleability, gets 3 paper towels, gets samples from the

cart or front table

2. Recorder (Heart)- Tests for conductivity, Reporter for the group, everyone records

on their own sheet

4. MD (Spade)- tests for melting point, in charge of hot plate (before and after lab)