REVIEW CH 4-5 NAME________________PD____
FILL IN THE CHART, THEN ANSWER THE QUESTIONS
Element group period #outer e charge #e levels family main characteristic
K
Argon
7 2
1 3
4 alkaline earth
________________________________________________________________________
1 non reactive gas
DEMONSTRATIONS. Sodium and potassium are kept under ________ because they are very ___________. This family of elements gets _________ reactive as you go down the group. We know that because we saw that _______ is more reactive than _________.
Magnesium is less reactive than the __________ family, but more reactive than the ____________________ family. Magnesium will burn with a bright light forming a white ash of ______________, but a paper clip made of iron will ________.
Light bulbs have a _____________ inside of them made of the element ___________. This element is used because it has the highest __________ ___________. This metal glows _________ hot when the light turned on. The metal piece will last a long time if the bulb is not broken, because the inside of the bulb is filled with _________ gas which is ________________. However, if the glass is removed, the piece of wire burns up quickly because it is surrounded by _________ gas which is very reactive. The yellowish powder remaining is _________________.
List the 8 families of elements we learned. Which groups are in them?
List characteristics of each group. (Halogens, being very reactive, are poisonous, and make good disinfectants)
Use these words for the following: smaller, larger, gain, lose
When a metal becomes an ion it _______ electrons, and becomes ______.
When a nonmetal becomes an ion it _______ electrons, and becomes ______.
As you go down a group, the atomic radius gets_________, and as you go across a period the atomic radius gets __________. Metals __________ electrons, and nonmetals _____ electrons. An oxygen atom will ____ electrons when it becomes an ion.