Which option is the smallest particle that represents the element iron? O A. An electron of iron
B. An atom of iron
C. A crystal of iron
D. A molecule of iron

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a.an ionic bond is formed between the oxygen and carbon atoms. b.four valence electrons are shared. c.two valence electrons are shared. d.valence electrons are shared between oxygen atoms.

How many neutrons does element x have if its atomic number is 29 and its mass number is 86?