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Midterm Review A
Review for midterm Part A
Question | Answer |
---|---|
Law that states that the mass before a reaction will equal the mass after the reaction | Conservation of Mass |
Method used to separate sand and water | filtering |
Method used to separate salt and water | Evaporation |
A property that helps to identify a substance but does not change the matter | physical property |
an experiment in which nothing is allowed to enter or leave | closed system |
The group of elements which do not react with other elements | noble gases |
Where are metals found on the periodic table? | left side |
a solid formed from the combining of 2 clear liquids | precipitate |
How many elements are in KOH? | Three |
the number written below and behind a symbol to show the number of atoms | subscript |
property that can be determined by looking at the periodic table | chemical reactivity |
a combination of 2 or more substances not chemically combined | mixture |
How is the periodic table arranged? | atomic number |
What kind of charge will an ion have if it gains electrons? | negative |
If a gas escapes during a chemical reaction, the reaction is considered a(n) ___ system. | open |
two or more elements chemically combined | compound |
family of most active metals | alkali |
the substance being dissolved | solute |
the substance doing the dissolving | solvent |
If an atom loses electrons, it will have a ___ charge. | positive |
the ability of a substance to be hammered into thin sheets | malleability |
matter that has no shape and does not take up a definite amount of space | gas |
a substance composed of only one kind of atom | element |
the smallest particle of matter | atom |
group in the periodic table that contains elements used in computer chips | metalloids |
the amount of heat needed to change the temperature of a substance 1 degree | specific heat |
the ability of a substance to conduct heat | thermal conductivity |
state of matter that has a definite shape and takes up a definite amount of space | solid |
ability of a substance to be pulled into a wire | ductility |
group of elements that are brittle, can be many colors, not shiny and poor conductors of heat and electricity | nonmetals |
positive particle found in the nucleus of an atom | proton |
negative particle that orbits the nucleus of an atom | electron |
particle in the nucleus of an atom with no charge | neutron |
state of matter that has no shape but takes up a definite amount of space | liquid |