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Science Chapter 1

Ali 5th grade

Elements building blocks of matter that can not be broken down into smaller peices
chemical property combines with something then changes
physical properties things about it that can be seen or measured without changing a material
mass measure of an amount of matter on an object
atom smallest partical of an element that has the same properties of the element
atomic number the number of protons. identifies the element
molecule atoms can combine to make molecules. smallest part of a substance made from more than one atom
pedriotic table coloms are simular ex. metal,gas. the rows become less reactive to the right
group going up and down same as a family. they are all similar
period a row in the periodic table. unlike groups atoms in a period are very different
metals shiny, can bend, usually solid at room tempature. usualy good conductors of heat and electricity
conductor allows heat and electricity to pass through them easily
malleable it bends and changes shape without breaking
alloys metals made by mixing two or mormetals together
compound a kind of matter made of a combination of two or more elements. properties of compounds are different from the properties of elements that they contain.
salt compounds made of particals held together by opposite charges
protons protons have a positive charge +atoms missing an electron have a positive charge
electrons they have a negative charge -atoms with an extra electron have a negative charge
salt properties the desolve in water and conduct electricity well
mixture when you combine two things together and it does not change
solution speacial mixture in which a substance is dissolved. it spreads out enenly and will not settle.
Created by: alikat