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29 Cards in this Set
- Front
- Back
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Which bonds do non-metals form? |
ionic and covalent bonds |
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What element is the lightest element? |
hydrogen |
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Can metalloids conduct heat and electricity? |
Yes, typically in higher temperatures |
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Are halogens ever found in their pure form in nature? |
No, they are unstable and highly reactive |
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Are noble gases stable elements? |
Yes, because they do not react with other elements under ordinary circumstances. |
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Halogens |
The elements in family 17 of the periodic table. |
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Metalloids |
Elements that have both properties of metals and non-metals. |
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Noble Gases |
Elements which have full outer energy levels and do not react with other elements under ordinary conditions |
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Inert Gas |
Gas that is thought to be unable to react with other substances. |
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Hydrogen |
A colorless, odorless, tasteless gas that is lightest of all known elements. |
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Describe the common laboratory procedure to test for the presence of hydrogen. |
A flame test. Because when set on fire hydrogen produces a red flash and a characteristic popping sound. |
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Name three halogens and describe how the compounds made from them are used. |
1. Sodium Flouride- hard, acid resisting layer on the surface of your teeth 2. Sodium Chloride- table salt 3. Silver Bromide- photographic filmq |
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Name two elements discussed in this unit that are naturally radioactive. |
1. Tritium 2. Radon |
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Explain the connection of alkaline-earth metals with the Nuclear Test Ban Treaty. |
The strontium 90 was finding its way into mother's milk, contributing to the treaty. Nuclear testing was now forced underground. |
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Name three properties of metalloids. |
1. malleable 2. ductile 3. conduct electricity |
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Name three properties of Arsenic. |
1. metalloid 2. toxic 3. combines with sulfur |
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What is the name of the element which God uses to fuel the stars and the sun? |
hydrogen |
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What does halogen directly translate to in Greek? |
"salt producer" |
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What is the halogen most often used to kill bacteria in drinking water? |
chlorine |
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Where are noble gases primarily found? |
the atmosphere |
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What are the most recent group of chemicals to be discovered? |
noble gases |
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What is the noble gas most often used in lighted signs? |
neon |
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List three unique properties of hydrogen. |
1. colorless, odorless, and tasteless 2. lightest of all elements 3. highly reactive at high temperatures |
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List three uses of hydrogen. |
1. fuels rockets 2. hydrogen bomb 3. combines with oxygen to make water 4. fuels the stars and sun |
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If you were going to choose a gas to keep something floating in the air, which gas would be possible choices? |
1. hydrogen 2. nitrogen 3. helium |
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Which gases would be preferable? |
Helium is lighter than air. It's preferred because it is lighter than air and is a noble gas. Unlike, hydrogen which is more likely to explode. |
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What is the formula of the universe? |
78% Nitrogen 21% Oxygen |
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Isotope |
a variation of an element with a different number of neutrons |
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Name three isotopes of hydrogen and their uses. |
1. protium- soap 2. deuterium- heavy water 3. tritium-radioactive warfare |
