1. What does it mean for an element to be reactive?
A. It doesn’t have a full outer shell
B. It is NOT a noble gas
C. It is going to want to form bonds with other atoms
2. Which family of elements is very UNreactive and therefore will not form bonds?
A. Noble Gases- group #18
3. All the elements in group #18 have _________ electrons except for ____________ which only
has _____. Explain why this element is unreactive even though it doesn’t have 8 electrons?
A. Helium is a noble gas with 2 electrons because the first shell can only hold 2 electrons
and therefore it is “full” and doesn’t want to form bonds/react.
4. Last week I mentioned that elements in group 1 want to lose an electron. Why?
A. They only have one in their outer shell. If they lose it, the shell below is full and that
“full” shell becomes the valence.
1. Most atoms are electrically neutral. What does this mean?
a. Protons = electrons
2.
Draw a Bohr diagram for Chlorine.
3. How many valence electrons does it have?
a. seven
4. Draw a Lewis dot diagram for Chlorine.
5. Carbon-14 has __8__ neutrons.
1. List 2 elements from each of the following families:
Alkali Metals Lithium , Sodium, Potassium, Rubidium, Cesium, Francium
Alkaline Earth Metals Beryllium, Magnesium, Calcium, Strontium, Barium, Radium
Halogens
Fluorine, Chlorine, Bromine, Iodine, Astatine
Noble Gases Helium, Neon, Argon, Krypton, Xenon, Radon
Transition Metals Zinc, Silver, Gold, Platinum…
2.
Which of the above families would be shiny, solids that are good at conducting electricity?
a. Metals: Alkali Metals, Alkaline Earth Metals, Transition Metals
3. Why do elements in the same group have similar properties?
a. They have the same number of valence electrons which makes them behave similarly
4. From left to right, what is the order of zones on a periodic table?
a. Alkali Metals, Alkaline Earth, Transition Metals, Metalloids, Halogens, Noble Gases
1
BR- 11-15-10
1. What does it mean for an element to be reactive?
2. Which family of elements is very UNreactive and therefore will not form bonds?
3. All the elements in group #18 have _________ electrons except for ____________ which
only has _____. Explain why this element is unreactive even though it doesn’t have 8
electrons?
4. Last week I mentioned that elements in group 1 want to lose an electron. Why?
BR-11-16-10
1. Most atoms are electrically neutral. What does this mean?
2.
Draw a Bohr diagram for Chlorine.
3. How many valence electrons does it have?
4. Draw a Lewis dot diagram for Chlorine.
5. Carbon-14 has ____ neutrons.
BR 11-17-10
1. List 4 elements from each of the following families:
Alkali Metals
Alkaline Earth Metals
Halogens
Noble Gases
Transition Metals
2. Which of the above families would be shiny, solids that are good at conducting electricity?
3. Why do elements in the same group have similar properties?
4. From left to right, what is the order of zones on a periodic table?
5. Define:
atoms
elements
compounds
valence electrons
energy level
proton
neutron
electron
subatomic particle
isotope
atomic mass number
average atomic mass
atomic number
2
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