Which is classified as an inner transition element?
a. calcium
b. copper
c. fermium
d. helium

Which part of a feedback mechanism is able to monitor the conditions outside of cells and usually uses nerve cells to relay this information to an intergrating center

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?