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Chemistry Unit 1
Question | Answer |
---|---|
Chemical reactions can be identified by: | A change in appearance of substance, A detectable energy change, The formation of at least one new substance |
There are around ... elements. | There is around 100 elements |
When different elements react together a ... is produced. | When different elements react together a compound is produced. |
An element is made of only one type of? | An element is made of only one type of atom |
Compounds ending in "ide" have: | Compounds ending in "ide" have two different elements present. |
Compounds ending in "ite" or "ate" have: | Compounds ending in "ite" or "ate" have three elements present, one of which is oxygen. |
When two substances come together without reacting: | When two substances come together without reacting, then a mixture is formed. |
A solution is formed when a solute dissolves in a solvent. | A solution is formed when a solute dissolves in a solvent. |