04 NOV 14 Starter: compound and element difference Go back to Earth’s Major Elements to help you answer.
Starter: oxygen The Earth’s crust contains an abundant (plentiful) amount of oxygen.
Starter: oxygen The human body contains an abundant (plentiful) amount of oxygen.
Starter: oxygen Sea water contains an abundant (plentiful) amount of oxygen.
Practice: Elements Compounds
Practice: Elements are pure substances represented by a chemical symbol. Other substances are made using elements, either in pure form or a combination of elements. Example: The most abundant element in the Earth’s crust is oxygen (O).
Practice: A compound is a combination of elements chemically combined. Compounds are two or more elements, such as water (H 2 O) or salt (NaCl). The Earth’s crust is combined in compounds such as Silicates (SiO 4 )which contains both elements Silicon and Oxygen.
Application: Chemical formula Number of elements H2OH2O NaCl C 6 H 12 O 6 S NH 4 OH C Number of elements? 2 elements
application: Chemical formula Number of elements Name of elements H2OH2O NaCl C 6 H 12 O 6 S NH 4 OH C Name of elements? 2 elements H=hydrogenO=oxygen
connection: Element or compound? Chemical formula Number of elements Name of elements Element or compound H2OH2O NaCl C 6 H 12 O 6 S NH 4 OH C 2 elements H=hydrogenO=oxygen compound
exit: Model? Chemical formula Number of elements Name of elements Element or compound model H2OH2O NaCl C 6 H 12 O 6 S NH 4 OH C 2 elements H=hydrogenO=oxygen compound