select the correct answer. which element has the electron configuration xe 6s² 4f¹⁴ 5d¹⁰ 6p²? a. gold…

select the correct answer. which element has the electron configuration xe 6s² 4f¹⁴ 5d¹⁰ 6p²? a. gold (atomic number 79) b. mercury (atomic number 80) c. lead (atomic number 82) d. potassium (atomic number 19) e. copper (atomic number 29)

select the correct answer. which element has the electron configuration xe 6s² 4f¹⁴ 5d¹⁰ 6p²? a. gold (atomic number 79) b. mercury (atomic number 80) c. lead (atomic number 82) d. potassium (atomic number 19) e. copper (atomic number 29)

Answer

Explanation:

Step1: Determine electrons from [Xe]

Xenon ([Xe]) has 54 electrons.

Step2: Calculate remaining electrons

For the configuration [Xe] 6s²4f¹⁴5d¹⁰6p², the electrons from the additional sub - shells are: 2 (from 6s²)+14 (from 4f¹⁴)+10 (from 5d¹⁰)+2 (from 6p²)=28.

Step3: Find total number of electrons

The total number of electrons is 54 + 28=82.

Step4: Match with atomic number

The element with atomic number 82 is lead.

Answer:

C. lead (atomic number 82)