Radium is a member of the alkaline earth family. in addition to being a part of this family, what is another property of radium that you can deduce from the information given in the periodic table? a) the atomic number tells us that radium is a synthetic element. b) based on its location overall, radium is considered a nonmetal. c) the atomic mass and atomic number tell us that radium is a radioactive element. d) the period number tells us that radium is the least reactive member of the family.

I'm not sure, but I'm pretty confident that the answer is C). The atomic mass and atomic number tell us that radium is a radioactive element.

Its C. I did this on usatestprep. Plz mark me brainliest and thank you

Explanation:

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.