choose the letter of the correct answer
__1which one of the following statement is correct
A. Water and nitrogen are both compounds.
B. Water is an elements and a nitrogen is a
compound
C. Water and nitrogen are both elements
D. water is a compound and nitrogen is a
elements
__2. When a substance is analyzed using an a electron microscope it is found to contain only one type of atom this substance is ____
A. an elements B. a molecule C. a mixture
D. a compound
__3. which elements can be found as charcoal or diamond
A. a hydrogen C. oxygen
B. carbon D. zinc
__4. calcium is the main component of our bones and teeth which is the correct symbol for this elements
A. C B. CI C. Ca D. Cu
__5. some jewelries are made up of gold . which is the correct symbol which is the correct symbol
A. Au B. Ag C. G D. Go ​