Atoms of the least reactive elements tend to have a. one or seven valence electrons. b. eight valence electrons. c. four or five valence electrons. d. no valence electrons

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

What type of radiation is lead emitting in the following equation? alpha particles beta particles gamma rays

Need asap question 1 minerals are organic compounds. true false question 2 what vitamin can be found in foods like oranges, grapefruits, and broccoli? a. vitamin a b. vitamin k c.vitamin c d. vitamin d question 3 what are minerals? a. chemical elements that are needed for body processes. b. organic compounds that the body needs in small amounts to function properly. c. small molecules used to build proteins. d. an organic compound that is insoluble in water and includes fats. question 4 how many types of vitamins does the human body need? a. 15 b. 11 c. 13 d. 17 question 5 vitamins are a good source of energy. true false