Which best describes how magnesium and oxygen bond?
a. they form an ionic bond by exchanging two electrons.
b. they form an ionic bond by exchanging three electrons.
c. they form a covalent bond by sharing one electron.
d. they form a covalent bond by sharing four electrons.
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To protect all four receptacles on a branch circuit that surrounds a swimming pool, you would install which of the following configurations? a. gfci feed-through receptacle at the end of the load's circuit b. gfci-terminated receptacle at the beginning of the load's circuit c. gfci feed-through receptacle at the beginning of the load's circuit and the other receptacles connected to the load side of that receptacle d. gfci-terminated receptacle at each end of the load's circuit

Phase changes are chemical changes. true or false

Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest