elements, compounds and mixtures Flashcards
1
Q
What are elements?
A
Elements are substances that cannot be split into simpler forms. They only contain one type of atom.
2
Q
What are compounds?
A
Compounds are formed when two or more elements are chemically bonded. They are always combined in fixed proportions.
3
Q
What are mixtures?
A
when two or more elements or compounds are physically combined.
4
Q
melting and boiling points
A
-a pure substance melts and boils at a specific temperature
-a mixture melts and boils at a range of temperatures
-impurities lower the melting point and raise the boiling point of a substance
