What is the atomic number of the atom shown? a. 8 b. 12 c. 18 d. 39.948

One does not belong why? ice, gold ,wood ,diamond and table salt

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.

Select the correct location on the image identify the element that humans need to breathe. 2015 er r ights reserved