NOVA: Hunting The Elements
27) The alkali metals, such as sodium, have ____ electron in their outer shell
1
6) How much gold is is harvested per ton of earth from the underground mine?
1 ounce
8) What is the worth ($$) or one 60-pound bar of gold?
1.5 Million
1)How many different elements are there?
118
40) Atoms of silicon have ___ protons, and ____ electrons
14 14
23) How many electrons are in the first shell of electrons? The second?
2 8
5) What process is used to separate gold atoms from crushed rock?
Assaying and Refining
18) The number of protons in an atom is known as that element's _____
Atomic number
2) What is the symbol for gold?
Au
13) When copper and tin are mixed together, the alloy ____ is formed.
Bronze
33) These elements (symbols only) are: __,__,__,__,__,__.
C H N O P S
37) What are some "trace" elements necessary for the body?
Calcium Iron Zinc Potassium Magnesium Sodium
9) Two rows above gold is the metal? Its symbol is?
Copper Cu
39) Atoms of hydrogen have one ____ and one ____
Electron Proton
22) Which subatomic particles determine an element's reactivity?
Electrons
17) Atoms with 1 proton are the element: Atoms with 2 protons are:
Hydrogen Helium
15) It is possible that the crack in the famous Liberty Bell was caused by too much _____
Impurities or too much tin
10) In what objects / industries is copper used?
Infrastructure, Electronics
4) What are some unique properties of gold?
It doesnt rust, it is strong, it is maleable
11) What are some unique properties of copper?
It is antibacterial, conducting
14) Why isn't copper alone used to make bells?
It is dentable and not strong
19) The chemical symbol of each element is based on the elements name in which language?
Latin
20) More than 70% of the elements on the periodic table are ___
Metals
38) Sodium is important for ___
Nervous system function
16) Metals form crystals, which means that they have an ____ of atoms
Ordered arrangement
30) Nitrates consist of three ____ atoms connected to one ____ atom.
Oxygen Nitrogen
41) Glass is made by melting what common substance?
Sand
43) Some of the rare earth elements have been found to be useful in repelling which marine animals?
Sharks
42) The two elements found in sand are _____ and ____
Silicon Oxygen
7) Gold does not share its electrons easily. Therefore, it is not very chemically reactive. What are two other metals that, like gold, don't react with other elements?
Silver, Platinum
12) What is the symbol for tin? What is its atomic number?
Sn 50
26) What will an atom of chlorine do to complete its outer shell?
Take one electron from anywhere
21) Why are the noble gases called "noble"?
The don't react or form compounds
28) What so the alkali metals do with that one electron?
They lose it
34) From which bodily fluid. An we harvest the element phosphorus?
Urine
31) Oxygen makes up ____ of our atmosphere?
21%
35) How many e- are in the outer shell of a carbon atom? So it wants to gain ___
4 4
32) Humans (& all living things!) are made up of mainly just ____ elements.
6
29) How many e- are in the outer shell of an oxygen atom? So it wants to gain ___
6 2
44) All atoms of carbon have ___ protons. Isotopes of carbon have different number of ____
6 Neutrons
36) What percent of a person's body is oxygen?
65%
24) How many electrons do the noble gases have in their outermost shell?
7
25) How many electrons does chlorine have in its outermost shell?
7
3) What is gold's atomic number?
79
