Science 9 Chemistry

Pregunta	Respuesta
What is matter	anything that has mass or volume
what is mass	the amount of matter an object contains
what is volume	the amount of space occupied by an object
what is density	how crowed together the particles of the matter is
what is mass measured in	grams
what is volume measured in	liters
what is density measured in	grams per milliliter
how do you calculate density	mass divided by volume
what is it called when a solid changes to a gass	sublimation
what is it called when a gas changes to a solid	deposition
what is the melting point of water	0 degrees C
what is the boiling point of water	100 degrees C
two things that happen in a physical change	-a change where no new substance is formed -properties of final substance are the same as the starting substance
two things that happen in a chemical change	- change where a new substance is formed - new substance has different properties than the starting materials
what are the starting materials in a chemical reaction	reactants
what is the product(s) in a chemical reaction	materials produced from the reactants in a chemical reaction
what are the 4 main rules that determine what symbol is used for the element	- using the first letter of the element -first and second letter of the element -first and third letter of the element - Latin names
what does the zig zag line of the periodic table indicate	the elements on the left are metals and the ones on the right are non metals
the only metal liquid at room temperature	mercury
most common elements found in diamonds	carbon
the most abundant element found in air	nitrogen
2 or more elements chemically bonded together	compound
solution (you can see through it)	2 or more substances where 1 dissolves evenly into the other, a liquid or gas
suspension (very hard to see through)	2 or more substances one is a liquid that doesn't dissolve
as a object moves from a solid to a gas what happens to its mass	it stays the same
as a object moves from a solid to a gas what happens to its volume	increases
as a object moves from a solid to a gas what happens to its density	decreases
as a object moves from a solid to a gas what happens to its energy	increases
what 3 subatomic particles make up an atom	proton, newtron, electron
which subatomic particle orbits the nucleus	electron
what is a period on the periodic table	horizontal row
what is a family on the periodic table	vertical row
3 patterns on the periodic table	-columns have the same # of valences -increase #p from L to R -add new orbit with each row
what does atomic mass mean	number of protons and newtrons in an atom
most reactive metals	Alkali Metals
2ed most reactive metals	Alkaline earthmetals
most reactive non-metal	Halogens
un reactive metals	Noble gasses
what are transition metals	metals found in the middle of the periodic table
located along the line between metals and non-metals	semi metals

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