Part 2: Mission Activated
Use information you have learned to help you match the Galactic Element Clues to our Earth elements
found in the Periodic Table below.
When you find a match, please type the galactic symbols (letter abbreviation) in the periodic table below,
next to Earth’s element symbol.
Periodic Table
Group 1
Group 2
Group 13
Group 14
Group 15
Group 16
Group 17
1
H/Gs
1.008
Group 18
2
He/
4.003
3
Li/
7.941
4
Be/
9.012
5
B/
10.811
6
C
12.010
7
N/At
14.006
8
O/
15.999
9
F/
18.998
10
Ne/
20.179
11
Na/So
22.989
12
Mg/
24.305
13
Al/Lm
26.981
14
Si/
28.085
15
P/
30.973
16
S/
32.065
17
Cl/Ms
35.453
18
Ar/
39.948
19
K/
39.098
20
Ca/
40.078
31
Ga/
69.723
32
Ge/
72.64
33
As/
74.921
34
Se/
78.96
35
Br/
79.904
36
Kr/
83.8
METALS
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METALLOIDS
NONMETALS
**Galactic Element Clues**
The clues in red have already been matched for you. Use those to guide you on your mission!
Gasium (Gs): This is the element with the lowest atomic mass number in the universe.
Luminesium (Lm): This element is a metal that is not very reactive and has a pretty low atomic mass number. When we round the
atomic mass number up to 27, we find that an atom of this element has 14 neutrons in its nucleus.
Mustarium (Ms): This is a nonmetal, gas that is very reactive and is toxic when the aliens inhale it. Its average atomic mass is about
35 amu.
Atmospherium (At): The alien’s notices that this is the most abundant element found in the Earth’s atmosphere. Its atoms contain 7
protons and 7 neutrons.
Softium (So): This is a soft metal that can be cut with a dull knife, but it can be very explosive when exposed to water. It has an
atomic mass of 23 amu.
Directions: Match the following Galactic Element clues to the Periodic Table above
Fireworkium (Fw): This element has 15 protons and 15 electrons in its neutral atom.
Toothium (T): This is a nonmetal with an average atomic mass number close to 19.
Floatium (Fl): This is a gas that the aliens often use to fill balloons and blimps. It contains two protons in its nucleus.
Breathium (Bt): This element is a nonmetal and has one less proton than an atom of Toothium and has an atomic mass
close to 16 amu.
Lightium (Lg): This is a gas that does not react with other elements. It glows when it is heated in a lamp or vacuum
tube. It contains one more proton in its nucleus than Toothium.
Rottoneggium (Re): This is a nonmetal with one less electron than Mustarium. It has a total of 16 electrons in its
electron cloud.
Nobelium (Nb): This gas is located directly below Lightium on the periodic table and has an atomic mass close to 40
amu with 18 protons.
Liquidium (Lq): This is a nonmetal and has the second largest atomic mass number on the alien periodic table.
Supermanium (Sp): This element has the largest atomic mass unit on the alien’s periodic table at close to 84 amu.
Bonsium (Bo): This element is important for bone strength, both for aliens and earthlings. It is a metal in Group 2 of
the periodic table and has 20 neutrons.
Organium (Or): This element makes up diamonds, which are not as valuable in other places in the universe as they are on
Earth. It contains six protons in the nucleus of its atom.
Killum (Ki): This is a notoriously poisonous metalloid with an atomic mass close to 75 amu.
Universium (Uv): This is a heavy nonmetal, a pretty large atomic mass number and chemical properties similar to
Rottoneggium and Breathium.
Semicoductium (Sc): This element is the metalloid with the lowest mass. It has one less proton than Organium.
Computerium (Co): This is an element that the aliens use in their electronics, stun guns, and in their communication
devices because it is a semi-conductor. Its mass is significantly greater than the mass of Semicoductium and it has
14 electrons.
Ikium (Ik): This is a semi-conductor that is found below Computerium on the periodic table. The element has 32
protons and 41 neutrons.
Spriklium (Sk): An atom of this element may have an actual mass of 70 amu with 39 neutrons.
Alloyium (Am): This is a relatively rare metal that is often used as a hardening agent in metal alloys/mixtures. It is the
second lightest metal on the periodic table.
Metium (Me): This is a very reactive metal with the lowest mass of all the metals on the entire periodic table.
Bananium (Bn): This element has similar chemical properties to Softium and Metium, but is heavier than both.
Abundium (A): This is the ninth most abundant element in the universe. It is a metal with 12 protons in its nucleus.