Question

Use the periodic table to give the symbol of the element that meets the following conditions.

The element has six electrons in energy level n=3.

The element has one electron in the 6p sublevel

The element's electrons complete the 7s sublevel.

The element has four 4p electrons.

Answer 1

The element has six electrons in energy level n=3.

The element is sulfur. Symbol: S

Electron configuration of S : [Ne]3s²3p⁴

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The element has one electron in the 6p sublevel.

The element is thallium. Symbol: Tl

Electron configuration of Tl : [Xe]4f¹⁴5d¹⁰6s²6p¹

^-

The element's electrons complete the 7s sublevel.

The element is radium. Symbol: Ra

Electron configuration of Ra : [Rn]7s²

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The element has four 4p electrons.

The element is selenium. Symbol: Se

Electron configuration of Se: [Ar]3d¹⁰4s²4p⁴