Hunting the elements video questions – Flashcards
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Everything we know and in the universe is made from approximately how many elements?
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92 elements
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What is being minded for in the Nevada mine at the beginning of this video?
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Gold
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What is the symbol for gold?
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Au
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What makes gold unique among the elements?(three things)
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1. Doesn't rust or tarnish
2. Malleable
3. Soft metal
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About what fraction of all elements are metals?
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3 quarters
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Name the three of the six "Nobel Metals"?
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Silver(Ag), Palladium(Pd), Platinum(Pt), Iridium(Ir), Osmium(Os), Gold(Ag)
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Approximately how long have humans been melting and using copper?
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7,000 years
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Name the specific things which copper is used for
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1. Electronic goods
2. Wire
3. Plumbing
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What are two properties of copper which make it very important
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It's malleable and good conductors of electricity
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Copper is combined with tin to make what alloy?
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It makes Bronze
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Why did the liberty bell crack?
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It had To much tin
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Metals have an orderly arrangement of atoms which makes them _______
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In pure metals atoms are arranged in rows and columns which makes them crystals
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What Determines what kind of elements an atom is?
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The number of protons
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Which side of the table would you find the non-metals on?
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The right side
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what does atomic mass determine
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The number of protons and neutrons in an atom
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Why aren't electrons included in the calculation of atomic mass?
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The mass of electrons is insignificant relative to protons and neutrons
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Why are the Nobel gases Nobel?
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Because they don't react or form compounds with other elements
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What determines how an atom will react?
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The number of electrons in thier valence shell
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What is the name of the column in the periodic table next to the noble gases? Why are they so reactive?
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Halogens. Because they only need one more electron
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Why are the alkali metals so reactive?
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Because they have an extra electron they want to get rid of
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What do you get when you combine sodium and chlorine?
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Table Salt
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How do forensic scientists why study explosions determine what explosive was used?
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They swab evidence and test in at a lab to determine what was used
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What six elements make up most life?
Give an example of a real life object where you would find each of these elements
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1. Carbon (C)
2. Hydrogen(H)
3. Nitrogen(N)
4. Oxygen(O)
5. Phosphorus(P)
6. Sulfur(S)
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In what golden fluid could try find phosphorus?
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Urine
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Name two common sources of carbon
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1. Graphite
2. Diamonds
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What element was not present in the early atmosphere?
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Oxygen
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From where did the hydrogen in the universe originate?
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* The Big Bang
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Describe how the elements heavier than Fe form
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in a supernova explosion
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What is the second most abundant element in the earths crust? What is the most common use for this element
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* Silicon
* Its most commonly used for making glass
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Where would you find the rare-earth metals on the periodic table?
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Near the bottom of the table
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What is one hypothesis why sharks are repelled by rare-earth metals?
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It gives them an electric shock: Shark fins have a slight (-) charge and ions from rare earth elements have a (+) charge creating a current of electricity which gives them a shock.
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What is the length of time it take for half of a radioactive substance to decay ?
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A half life
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What were the names of the two bombs which the U.S. Developed and used in 1945? What elements were used to create these bombs?
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Little boy and Fat man
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What elements are rare earth magnets made of
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neodinium, iron and boron
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What are trace elements? Name 4 of the trace elements and what their function is
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Mg( energy metabolism, Ca( bone density), Fe( transports oxygen via hemglobin), Na( nervous system), K( same as Na), Zn( same as Mg)
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What conditions did the earliest bacteria need for energy metabolism?
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light and water....oxygen was a byproduct
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describe the process of fusion and how it produces helium
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Its a process that forces 2 hydrogen atom to merge to form helium.
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In core samples taken at Yellowstone, which layer is the blue-green algae( cyanobacteria)
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Top layer.. to use light and water for energy and release O2 as a waste product
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How is the mousetrap simulation similar to a fission chain reaction?
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Mousetrap represented the uranium atom, the ping pomg ball the neutrons. Single netron(ball) causes a chain reaction to split the U atoms
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What happens when a star runs low on hydrogen fuel?
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Get a fusion of He to produce heaver atoms up to Fe (At # 26)
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What is added to Gorilla glass to make it stronger?
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Na,K and Al
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What are rare earth elements in such short supply?
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China withholding, and difficult to separate. Most are manufactured synthetically in the lab
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What is an isotope?
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atom with the different # of neutrons
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Why are atomic weights not in whole numbers, but show a fraction?
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relative weights of all the isotopes of the atom,
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Name 3 isotopes of Carbon. What are the significance of 2 of them.
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C12, C13 and C14. The first is the most common and stable and is the foundation of life on Earth. C14 decays after death of living thing, turns into N and is used for carbon dating to help understand climate change.
