Teresa has taken three tests worth 100 points each. Her scores are 85, 93, and 88. She has one test left to take. To get an average score of 90, what must the sum of all her test scores be?
a.
400
c.
600
b.
360
d.
300

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.