Answer:
insoluble simply means something that cannot be dissolved in water (:
Answer:
all 4 of the middle ones are part of the nucleus
Any compound with multiple covalent bonds
They both have two electron shells. Period indicates number of shells.
Answer:
halides
Explanation:
This is one electron away from having a full octet of eight electrons, so these elements tend to form anions having -1 charges, known as halides: fluoride, F-; chloride, Cl-, bromide, Br-, and iodide, I-. In combination with other nonmetals, the halogens form compounds through covalent bonding.