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Science Chemistry Review

Across
A pH between 7.1-14.
A way to separate two gases.
A way to separate a solid and a liquid
_______ name. One of the pieces of information given on the periodic table.
A pH of 2 is very ______.
What is the result of particles on one mixed with another?
Atomic ______. One of the pieces of information given on the periodic table, relates to weight.
______ mixture. A mixture of varying composition (at least two different components mixed together). They are unevenly mixed. Ex. dirt and sand
A special mixture when one substance becomes completely intermingled with those of another and remain that way indefinitely. Ex. Milk and Tea
Small holes in this to strain solids.
Why do crystals form? (two words)
formation of one solid (usually a powder), for example, potassium iodide and lead nitrate form solid potassium nitrate
A way to separate a liquid and a gas.
Using this blows a lighter solid off a heavy solid.
In a ______ change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.
Part of an atom with a positive (+) state.
When one substance is mixed in another so that it is evenly dispersed throughout (evenly mixed). Ex. Sugar and water
This is not a chemical change. _____ energy coming for another source.
The smallest unit of matter that has the characteristic properties of a chemical element.
A way to separate a solid and a liquid
______ number. One of the pieces of information given on the periodic table.
________ is when no more of something can be absorbed, combined with, or added.
_______ change—unpredictable change, for example, cabbage juice turns pink in acid
Down
The pH of 10 is very ______.
_______ substance. All of the atoms or molecules of the substance are the same. They can be very difficult to find in nature. Ex. diamonds, salt, pure sugar
A way to separate two liquids.
Forming a ______ through freezing. This is a state change.
The smallest particle in a chemical element or compound that has the chemical properties of that element or compound. _____ are made up of atoms that are held together by chemical bonds.
When one substance is mixed in another so that it is evenly dispersed
Part of an atom that is negative (-).
_____ is the sticking together of particles of the same substance.
Short form of a name. One of the pieces of information given on the periodic table.
formation of a gas, for example, adding baking soda to vinegar to produce carbon dioxide gas.
A way to separate two liquids.
Uses attraction to separate two solids.
______ change—heat emitted (exothermic) or heat required (endothermic), for example, fire, cold packs
A pH between 0-6.9
Part of an atom that is neutral.
A ______ change in a substance doesn't change what the substance is. It just changes its form, shape, or state.
The centre of an atom.
Using this washes the lighter solid off.
Measures the acid or alkaline of a substance.
______ change. for example cooking.
Creating a ____ through evaporation (state change).