Considering radiation weighting factors only, how many times more dangerous are alpha particles than protons? a. 1
b. 2
c. 10
d. 20

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear