Which of the following answers give the correct number of subatomic particles for ?

Consider the following atoms in which X represents the chemical symbol of the element: (4.4, 4.5) ¹⁶₈X ¹⁶₉X ¹⁸₁₀X ¹⁷₈X ¹⁸₈Xa. What atoms have the same number of protons?

Indicate if the atoms in each pair have the same number of protons, neutrons, or electrons. (4.4, 4.5)c. ⁴⁰₁₈Ar, ³⁹₁₇Cl

Complete the following table for the three naturally occurring isotopes of silicon, the major component in computer chips: (4.4, 4.5)

For each representation of a nucleus A through E, write the atomic symbol and identify which are isotopes. (4.4, 4.5) Proton (red) Neutron (white)a.

Supply the missing information in the following table:

Write the atomic symbol for the isotope with each of the following characteristics:c. 25 electrons and 28 neutrons