What is the fourth quantum number of the 3p electron in aluminum, 1s22s22p63s 3p?? A. mg= -1
B. ms = +1/2
c. ms = +1
D. ms = 0​

On the periodic table, elements are arranged by which of the following. a. mass numbers. b. increasing atomic number. c. alphabetical order. or d. density

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.

The half-life of a certain element is 100 days. how many half-lives will it be before only one eighth of this elementremains?