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Chemistry Test
Science: Tuesday, March 5th, 2012
| Question | Answer |
|---|---|
| element | pure substance that cannot be broken down into another state. ex: hydrogen, oxygen |
| compound | a substance made of two or more elements chemically combined. |
| atom | building bolck of matter, smallest part of an element |
| chemical symbol | 1 or 2 letters that represent the name of an element |
| chemical property | characteristics of matter that describes how it reacts with other matter |
| physical property | characteristics of matter that can be measured or detected by the senses |
| chemical formula | group of elements that show the elements on a compound.(H2O) |
| protons | particles that have a positive charge(pt) |
| neutrons | particles that have no charge (n*) |
| electrons | particles that have a negitive charge (e-) |
| atomic number | number that tells the nnumber of protons in the element |
| atomic mass | total number of protons and neutrons |
| group | (18) vertical colums on the peridoic table |
| periods | (7) horizontal rows on the peridoic table |
| metallic properties | act like metals, usually shiney, good conductors of heat and electricity |
| metalloids | the elements along the ziz-zag line that have metallic and non-metallic properties. |
| Phosphorus | P |
| Iron | Fe |
| To find protons, look at the Xxxxxx xxxxxx | atomic number |
| to find electrons, loot at the Xxxxxx xxxxxx | alomic number |
| to find neutrtons, look at the Xxxxxx xxxx xxx xxxxxxxx xxx xxxxxx xxxxxx | atimic mass and subtract the atomic number |
| From left to right, name the classified columns on the periodic table. | Alkali metals, alkali earth metals, transition metals, metalliods, halogens, noble gasses, |
| element for alkali matals | lithium |
| element for alkali earth metals | beryllium |
| element for transition metals | iron, zinc, titanium, nickel, copper, cobalt, chromium..... |
| element for metalliods | boron |
| element for halogens | flourine |
| element for noble gasses | helium |