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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 |