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Science Chapter 1
Ali 5th grade
Question | Answer |
---|---|
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. |