Match the number of valence electrons to the listed elements using the periodic table.
A. 4
B. 5
C.7
D.3
E.6
1.oxygen
2.bromine
3.aluminium
4.carbon
5.nitrogen

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

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

What are fossils of organisms that existed over a wide area but only for a limited time period called?