What is the mole ratio of d to a in the generic chemical reaction?
4a + b --> c + d

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

How are isotopes of the same chemical element alike? how are they different?

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.