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A __________ is a single substance not mixed with anything else.
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A pure substance can be an element or a compound.
True
false
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A pure substance has a fixed melting point and boiling point.
false
true
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An_______________ consist of two or more substances mixed together.. It does not have a fixed melting point and boiling point. It melts or boils over a range of temperatures.
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An impurity doesn't lower the melting point and increases the boiling point of a substance.
true
false
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An _________ is a pure substance made up of only 1 type of atom.
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Select the correct factors of elements :
An element is a pure substance made up of only 1 type of atom
An element cannot be broken down into any simpler form by any known chemical change.
Elements are the same thing as compounds
These elements may be found on the periodic table
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What is the chemical symbol for aluminum .
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A combination of atoms from different elements is a
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The smallest complete unit of a compound that has the properties of that compound is a
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•A __________ is a substance containing 2 or more elements/compounds that aren’t chemically combined.
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Mixtures cannot be easily separated ?
true
false
- Multiple ChoicePlease save your changes before editing any questions.
Mixtures are _______
chemically combined
physically combined
typically combined
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Salt and water is a ________ ______
homogeneous mixture
heterogeneous mixture
- Multiple ChoicePlease save your changes before editing any questions.
Sand and water is a
homogeneous mixture
heterogeneous mixture
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A ___________mixture looks the same throughout the mixture
da baby
heterogeneous
homogeneous
William
- Multiple ChoicePlease save your changes before editing any questions.
In a __________ mixture you are able to identify the different particles present.
suspension
colloid
homogeneous
heterogeneous
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Solutions are homogenous mixtures of solute and solvent.
falso
true
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An/A ___________ is one in which water is the solvent
Aqueous solution
Aquarium solution
Non Aqueous solution
fizzy solution (man like sweeney peeney yzt )
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A solution where water is not the solvent is called a
aquarium solution
Sam sharp solution
non-aqueous solution
aqueous solution
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Characteristics of solutions :
solutes dissolve in under 30 secs
Solutes are not visible
All parts of the solution have the same chemical composition, chemical and physical properties
When left to stand, the solute and solvent do not separate.