Solutions to p31
1. A metal is a substance with loose electrons, making it shiny and malleable and causing it to conduct heat and electricity.
Examples: Li and the rest of the alkali metals
Be and the rest of the alkaline earth metals
Sc, Ti, V etc
2. A non metal is a substance that holds on to its electrons, causing it to be a poor conductor of heat and electricity.
4. a. +1
d. (+) because it is a metal
6. non metals
7. Tests: conductivity, malleability, acid
check its conductivity (should be lower than most metals but higher than non metals)
should be shiny but not malleable
should not react with acid
If all of the above are true than you can safely conclude that the substance is a metalloid.
8. W 1st column; third row (Na)
X 1st column; first row (H)
Y column VII A; third row (Cl)
Z column III A (B)
1. a. AlCl3