There are ________ unique substances (elements) arranged on an amazing chart that reveals their hidden secrets to anyone who knows how to read it. |
118 |
All the gold ever mined would fit into a single cube about _______ feet on a side. |
60 |
Three-quarters of the elements are ________________. |
metals |
How an atom reacts chemically depends on how willing it is to share _________________ with others. |
electrons |
How much would a 60 pound block of gold be worth in dollars? $_________________________ |
1 and a 1/2 million dollars |
List two things copper is used for: |
a) wire b) plumbing |
When copper is combined with another element, __________, it makes bronze, the first manmade |
tin |
The number of ________________ determines what kind of element the atom is. |
protons |
The number of protons is called the atomic ________________ and it’s the fundamental organizing |
number |
Metals are shiny, malleable materials that conduct ____________________________. |
electricity |
Most people think of _________________ as white and chalky, but it’s actually a silver, shiny metal. |
calcium |
. Fiesta® ware bowls, like this one from the 1930s, gets its orange color from _________________ , and |
uranium |
The table organizes the elements by atomic number, that is, the number of protons in each atom, yet |
mendeleev |
The group that fits neatly onto the end of the table, the _____________ __________, are unwilling to |
noble gasses |
Protons may determine the identity of an element, but _________________ rule its reactivity. |
electrons |
An atom with _______ electrons in its outer shell makes one happy, satisfied atom. |
8 |
The column just before the stable noble gases are called the _________________. They have an outer |
halogens |
The ______________ metals are the first column. Each of them has full shells, plus one extra electron |
alkali |
The ion chromatograph looks for positively or negatively charged molecules, called __________, in the |
cation exchange |
. Every time atoms form a new bond, the reaction releases _______________. |
energy |
How do you speed up a fire to create an explosion? You regulate the amount of ________________ |
oxygen |
The oxygen that powers all those explosions makes up ______% of our atmosphere. It’s the most |
21% |
What six elements make life possible? |
C,H,N,O,P,S |
List two ways that carbon is found in its pure form: |
graphite, graphene |
Your body composition is about _______% carbon and _______% nitrogen. |
18% and 3% |
. Hydrogen and oxygen can actually be separated from water using a little bit of ___________________. |
electricity |
. In a person’s body, there’s _______% oxygen. |
65% |
. Phosphorus is actually involved in something really important called _________, which is the molecule |
ATP |
Phosphorus makes up about _______% of the human body. It was the first element isolated from a |
1% |
. Altogether just those six CHNOPS elements make up 97% of the weight of his body, but what about the |
T,R,A,C,E |
. _____________ is important for energy metabolism. |
Magnesium |
____________________ is an important part of nervous system function. |
Sodium |
. In total, the human body uses more than _______ elements in ways and quantities that are unique to |
25 |
As the planet cooled, another ancient microorganism evolved and changed everything. They are called |
Blue-Green Algae |
Around 90% of all the atoms in the universe are ________________, and they were all made by the Big |
Hydrogen |
Stars like our own sun are constantly turning hydrogen atoms into element number two: helium. It’s a |
Fusion |
By the time it’s fusing iron, a star is in its death throes. It begins to collapse, and if it’s massive enough, |
Supernova |
This element, with 14 protons and 14 electrons, is the 2nd most abundant element in the earth’s rocky |
Silicon |
Glass all starts with ordinary ___________, which is made of a combination of silicon and oxygen. |
Sand |
Glassmakers have learned how to precisely place minute amounts of ___________ atoms like sodium, |
Metal |
Switches made out of semiconductors made computers possible, but lately when it comes to high tech, |
Rare Earths |
List three uses of the rare earth metal neodymium. |
Magnets, Cars, Earbuds |
Where do the majority (98%) of rare earth minerals come from in the world? |
China |
. ___________ makes magnets, but adding neodymium makes magnets on steroids. |
Iron |
They accidently discovered that the strong neodymium magnets (and other rare earth elements) can |
Sharks |
Scientists now know that most elements come in more than one version. The different versions are |
Isotopes |
To determine how long ago droughts occurred, Scott is using __________________ to date the trees |
Carbon 14 |
. Carbon-14 can be sued to date samples up to __________________ years old. |
500 |
. At the bottom of the periodic table, beginning with number 84, polonium, all of the elements and their |
Radioactive |
Before the nuclear age, uranium was thought to be the end of the periodic table, but in the last 70 |
26 |
NOVA-Hunting the Elements
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