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.

Explanation:

Step1: Recall atomic - related rules

For a neutral atom, the number of protons = the number of electrons. The mass number of an isotope is the sum of the number of protons and neutrons.

Step2: Analyze Iron - isotopes

For Iron, the atomic number of iron is 26. So for the two iron isotopes:

• For the first iron isotope with 27 neutrons:
• Number of protons = 26 (since it's iron).
• Number of electrons = 26 (neutral atom).
• Mass number = 26 + 27=53. So it is Iron - 53.
• For the second iron isotope with 30 neutrons:
• Number of protons = 26.
• Number of electrons = 26.
• Mass number = 26+30 = 56. So it is Iron - 56.

Step3: Analyze the last two unknowns

For the element with 24 protons:

• It is Chromium.
• For the first case with - 54 (assuming it's mass number):
• Number of neutrons = 54 - 24=30.
• Number of electrons = 24 (neutral atom).
• For the second case with - 56 (assuming it's mass number):
• Number of neutrons = 56 - 24 = 32.
• Number of electrons = 24.

Answer:

	Iron - 53	Iron - 56	Chromium - 54	Chromium - 56
# of neutrons	27	30	30	32
# of electrons	26	26	24	24