A group of students is discussing the properties of an atom. Which of the following statements made by the students is FALSE? A.
An atom is neutral as it has equal numbers of electrons and protons.

B.
The nucleus is the heaviest part of the atom.

C.
The protons move around the nucleus.

D.
Each proton has the same relative mass as each neutron.

it's c. elements are placed in rows based on how may valencies electrons have.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year