Match the following electron configrations with the appropriate first ionization energy: a}1s2 2p2 3p6 4s2 3d10 4p6 5s1 1356 kj/mol
b}1s2 2s2 2p6 3s2 3p6 4s2 595 kj/mol
c}1s2 2s2 sp6 3p6 4s2 3d10 4p6 409 kj/mol

Which statement best describes how atoms combine to form sodium chloride (nacl)? a. a positively charged sodium ion and a positively charged chlorine ion form an covalent bond. b. a positively charged sodium ion and a negatively charged chlorine ion form an covalent bond. c. a positively charged sodium ion and a positively charged chlorine ion form an ionic bond. d. a positively charged sodium ion and a negatively charged chlorine ion form an ionic bond.

How does the viscosity of magma change as magma cools?

Ab c or d ? i’m not sure what the answer is