NOVA:HUNTING THE ELEMENTS QUESTIONS AND ANSWERS. Buy Quality Materials
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NOVA
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NOVA
NOVA:HUNTING THE ELEMENTS QUESTIONS AND ANSWERS. Buy Quality Materials
.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 _______ fe...
NOVA:HUNTING THE ELEMENTS QUESTIONS AND ANSWERS. Buy Quality
Materials
.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.
b.
a) wire
b) plumbing
When copper is combined with another element, __________, it makes bronze,
the first manmade
metal alloy.
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
principle of every table of the elements.
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
it's actually dangerously radioactive.
uranium
The table organizes the elements by atomic number, that is, the number of
protons in each atom, yet
the table's creator - a 19th
, -centruy Russian chemistry professor, named Dmitri ___________________,
knew nothing about protons or atomic numbers.
mendeleev
The group that fits neatly onto the end of the table, the _____________
__________, are unwilling to
mix with the other elements, to react with them.
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
shell that needs just one more electron to be full.
halogens
The ______________ metals are the first column. Each of them has full shells,
plus one extra electron
sitting in a new, outer shell
alkali
The ion chromatograph looks for positively or negatively charged molecules,
called __________, in the
residue, fragments of the original chemical explosive.
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
________________
and how closely it's packed together with other elements.
oxygen
The oxygen that powers all those explosions makes up ______% of our
atmosphere. It's the most
abundant element in the earth's crust.
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%
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