Reactivity
Valence Electrons
The Periodic Table
Elements
Surprise!
100
What does "reactivity" mean?
How an element behaves: will it gain or lose electrons
100
What is a valence electron?
An electron found in the last shell of an atom
100
The name of horizontal rows on the periodic table
Periods
100
What element has 15 electrons?
Phosphorus
100
This part of the atom tells us the atom's identity (It tells us what element it is!)
The PROTONS!
200
What 2 groups are MOST reactive? (They want to gain or lose electrons)
Group 1 wants to lose 1 electron Group 7 wants to gain 1 electron
200
What is the location of a valence electron?
The last shell (or energy level) of an atom
200
The name of vertical columns on the periodic table
Groups or Families
200
This element is in period 4 and group 1
Potassium (K)
200
How do you find the number of neutrons in an atom?
Atomic Mass - Atomic Number
300
The elements in group 2 want to lose 2 electrons. Which group will they most likely react with?
Group 6, because elements in group 6 need 2 electrons to fill their shell
300
What important information can we get from the number of valence electrons?
The reactivity of an element
300
What information can we get from the periods?
the number of energy levels
300
This element is in period 5, and is a noble gas
Xenon (Xe)
300
What group number are the noble gases?
Group 18
400
This group is not very reactive because it would gain OR lose electrons.
Group 4
400
How many valence electrons does Phosphorus have?
5 valence electrons
400
What information can we get from the group number?
Valence electrons
400
This element is a non-metal with 8 protons
Oxygen (O)
400
What group number are the alkali metals?
Group 1
500
Elements in group 1 would most likely react with...?
Group 7
500
How many valence electrons does an element in group 2 have?
2 valence electrons
500
What groups are the transition metals in?
Groups 3-12
500
This element is in period 3 and group 1
Sodium (Na)
500
Name on metalloid
Boron (B), Silicon (Si), Germanium(Ge), Arsenic (As), Antimony (Sb), Tellurium (te), or Polonium (Po)
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