1. Who is given credit for creation of the Periodic Table?
Dmitri Mendeleev
2. When he was putting the table together, what characteristics did he use to place the elements in order?
Rows - Increasing mass
Columns – Similar properties
3. What is the definition of atomic mass?
Individual Atoms: Number of protons plus number of neutrons.
Elements: Weighted average of the masses of the isotopes.
4. What units do you put on atomic mass? amu (Atomic Mass Units)
1 amu = 1/12 mass of Carbon-12
5. Does the atomic number increase or decrease as you move from left to right? How much does it change from one element to the next?
Increases by 1 for each element as you move from left to right
6. The vertical columns on the Periodic Table are called what?
Groups or Families
7. The horizontal rows are called what?
Periods
8. What states of matter are represented by the metals at room temperature (solid, liquid, and/or gas)?
Solid and liquid (all but mercury are solids)
9. There are two groups (families) on the Periodic Table that are considered the MOST reactive, what are they
(give name and number)?
Group 1 (IA) – Alkali Metals
Groups 17 (VIIA) – Halogens
10. Using your answer from question 9, how many valence electrons does each of those groups (families) have?
Group 1 (IA) has 1
Group 17 (VIIA) has 7
11. Na is a very reactive element in Period 3, what other elements in Period 2 would be considered reactive?
Lithium (group 1 – IA) and Fluorine (group 17 - VIIA)
12. Every element in the Carbon group (family) has how many valence electrons?
4
13. Looking at Group 2 (IIA) which element would be the MOST reactive?
Radium

14. If a reaction is going to take place, which Halogen would you expect to react the fastest?
Fluorine
15. What element do all LIVING creatures contain?
Carbon
16.
List 4 properties of metals a.
good conductors (heat and electricity) b.
solids at room temperature (except mercury) c.
malleable and ductile d.
luster
17. If K reacts very violently in water, what you expect Fr to do? Why?
React even more violently – Reactivity increases down a period
A
1 6
2
4
5
18.
Label the numbers and letters in the above Periodic Table
1 – Alkali Metals B – Non-metals
2 – Transition Metals C – Metalloids
3 - Halogens
4 – Lanthanide Series
5 – Actinide Series
6 - Alkaline Earth Metals
7 – Noble gasses
A- Metals
B
3 7

19.
The majority of the Periodic Table is made up of what kind of element?
metals
20.
What group (family) on the Periodic Table represents ALL three states of matter at room temperature
(give name and number)?
Halogens
Cs
132.91
21.
What do each of the four terms in the element box represent?

55 – atomic #

Cs – element symbol

Cesium – element name

132.91 – atomic mass
22.
What are valence electrons?
Electrons in the outer shell
23.
What do elements that belong to the same group have in common?
Same number of valence electrons; similar chemical properties
24.
What is the “octet rule”?
• Atoms are most stable if they have filled or empty outer shell of electrons
•
Filled shell contains 8 electrons (octet)
•
Except for H and He (atomic #1 & #2)
•
Atoms gain, lose, or share electrons to make filled or empty outer shell
•
Atoms gain, lose, or share electrons based on what is easiest.
25.
What is the trend in reactivity within the alkali metals and the alkaline earth metals?
Reactivity increases as you go down the column (most reactive elements at the bottom)
26.
What is the trend in reactivity within the halogens?
Reactivity decreases as you go down the column (most reactive elements at the top)
27.
Define Ionization Energy. Which metal has the highest ionization energy? Why?
The amount of energy needed to remove an electron from an atom.
Li – because it’s one valence electron is in energy level 2 which is close to the nucleus resulting in a much stronger magnetic pull on it than on the valence electrons of other members of the group which as in higher energy level.
28.
Define Electronegativity? Which element has the highest electronegativity? Why?
The ability of an atom to attract or gain an electron

F – because it only needs to gain 1 electron to fulfill the octet rule and its highest energy level is 2 so the magnetic pull on that electron will be greater due to the energy level’s proximity to the nucleus
29.
List the following elements in order of increasing ionization energy: Li, Ti, Ba, K, Fr
Fr, Ti, Ba, K, Li
30.
List the following elements in order of increasing reactivity: C, S, I, Te, F
C, Te, S, I F