Complete the table by
finding the mass number
for oxygen, sodium and
copper

answer: mass numbers equal the total number of heavy, or massive, particles in the nucleus. subtracting the atomic number from the mass number equals the number of neutrons in the nucleus. the number of protons and neutrons in an atom we can determine the mass number.

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper

b.

explanation:

10.0