Question

part iii. fill in the isotope names and any missing information on the chart. use your periodic table and the information provided. assume all atoms are neutral.

of protons 25

of neutrons 17 15

of electrons

of protons 32

of neutrons 30 32

of electrons

Explanation:

Step1: Recall atomic - number and mass - number relationships

For a neutral atom, the number of electrons is equal to the number of protons. The atomic number ($Z$) is equal to the number of protons, and the mass number ($A$) is the sum of the number of protons and neutrons ($A = p + n$).

Step2: First table

The number of protons is 25. Since the atom is neutral, the number of electrons is also 25. The mass number $A_1=25 + 17=42$. Looking at the periodic table, the element with atomic number 25 is manganese (Mn). So the isotope is manganese - 42.

Step3: Second part of the first table

Let the number of protons be $p_2$. Since the number of electrons is 15 (for a neutral atom, $p_2 = 15$). The mass number $A_2=15 + 15=30$. The element with atomic number 15 is phosphorus (P). So the isotope is phosphorus - 30.

Step4: Second table

The number of electrons is 32 (because for a neutral atom, number of electrons = number of protons). The mass number $A_3=32 + 30=62$. The element with atomic number 32 is germanium (Ge). So the isotope is germanium - 62.

Step5: Fourth part of the second table

Let the number of protons be $p_4$. Since for a neutral atom, number of electrons = number of protons, and the number of electrons is equal to the number of protons of the previous atom (assuming a continuation in the problem - context), $p_4 = 32$. The mass number $A_4=32+32 = 64$. The element is germanium, and the isotope is germanium - 64.

Answer:

Isotope Name	# of Protons	# of Neutrons	# of Electrons
Phosphorus - 30	15	15	15
Germanium - 62	32	30	32
Germanium - 64	32	32	32