Pick the statement that is most likely to be true of an element with low electronegativity. a. the valence electrons of the element are not shielded. b. the element has an almost empty valence shell. c. the atomic size for the element is very large. d. the atoms of the element have very few electron shells.

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.