Lesson 5.4 Patterns & The Periodic Table
b
All metals on the periodic table are solid at room temperature. a) True b) False
b
All non-metals are gases at room temperature. a) True b) False
Halogens
Contains nonmetals, 7 valence electrons in it's outermost energy level. Very reactive.
a
Elements in the same group (Family) all have the same number of valence electrons. a) True b) False
Alkali metals
Group 1, 1 electron in outer level, very reactive, soft, silver, shiny, low density; Lithium, Sodium, Potassium, Rubidium, Cesium, Francium
Noble gases
Group 18: Nonreactive family of nonmetals; 8 valence e- (full octet). All are gases at room temp.
9
How many electrons are in an atom of fluorine?
10
How many neutrons are in an atom of fluorine?
9
How many protons are in an atom of fluorine?
a
Rows on the periodic table (horizontal) are called periods. a) True b) False
b
The number 19 in this standard atomic notation is .... a) The atomic number b) The mass number
Hydrogen
The only element in group 1 that is not an alkali metal.
a
This group of elements tend to lose electrons in chemical reactions? a) Metals b) Non-metals c) Metalloids
b
What does the group number on the periodic table tell you? a) The number of energy levels b) The number of valence electrons
a
Which group of elements conducts electricity the best? a) Metals b) Non-metals c) Metalloids
b
Which piece of information on the periodic table allows you to determine the number of electrons in an atom? a) Mass number b) Atomic number
Alkaline Earth Metals
metallic elements in group 2 of the periodic table which are harder than the alkali metals and are also less reactive
