Answer:

9.The atomic number of an atom can be determine through the numbers of PROTONS

in the nucleus.

10.The atomic mass is the mass of an atom.Altough the SI unit o mass is kilogram, the atomic mass is often expressed in the non-SI unit dalton where 1 dalton is defined as

1/12 of the mass of a single carbon-12 atom,at rest.

Explanation:

Alam ko pala yung sagot akala ko dko alam hehe...

Pa brainliest and follow lods...

Lab u...

Answer:

9. the atomic number is a simbol: mater is a composed of atoms,and atoms have three basic blocks.

10.its like atomic mass is the number of / try to answer

example:

hope it help