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15 Questions
elements compounds and mixtures
Question | Answer |
---|---|
what is an element? | a component or constituent of a whole or one of the parts into which a whole may be resolved by analysis |
what is a compound? | composed of two or more parts, elements, or ingredients: |
what ia a mixture? | an aggregate of two or more substances that are not chemically united and that exist in no fixed proportion to each other. |
You have just won a block of pure 24-carat gold. Have you just procured an element, compound or mixture? | element |
*Water* is what all life in the world depends on. Is it an element, compound or mixture? | compound |
This gas is essential for us, and all other aerobic organisms, to survive. We inhale it along with the air we breathe (of which it forms approximately 21%) and it then helps in the oxidation of glucose in our bodies. | element |
The air we breathe - is it an element, compound or mixture? | mixture because Air is a mixture of several gases, with each of them retaining their own properties. Here's a brief outline of the composition of the air we breathe: Nitrogen Oxygen Argon Carbon dioxide, methane, inert gases |
the periodic table is divided into | metals and non metals |
In sweetened tea, the sugar is called a: | solute |
A mixture of dirt and water is an example of | a heterogeneous mixture. |
A homogeneous mixture can create a new substance. | false |
A pure substance that cannot be separated into simpler substances is called a(n) | element |
A pure substance that is composed of two or more elements that are chemically combined is a(n) | compound |
What makes an atom able to form a compound? | unfilled outer electron shells |
Aqua regia was a liquid used by alchemists to separate silver from gold. Was it an element, compound or mixture? | mixture |