Identify the element that would produce this spectrum.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Write the electron configuration for the element represented in this PES.

Tags

NGSS.HS-PS1-1

Sr²⁺ and Br^- are isoelectronic. Which has a smaller radius and why?

• Sr²⁺ because it has a greater nuclear charge, which applies a greater force of attraction on the electrons, thereby pulling them closer to the nucleus.

• Sr²⁺ because it has fewer electron shells, therefor have a less distance from the valence electrons to the nucleus.

• Br^- because it has a greater nuclear charge, which applies a greater force of attraction on the electrons, thereby pulling them closer to the nucleus.

• Br^- because it has fewer electron shells, therefor have a less distance from the valence electrons to the nucleus.

Tags

NGSS.HS-PS1-1

What is the electron configuration of arsenic?

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p³

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many unpaired electrons does phosphorous have?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-1

How many atoms are in 4.56 g of pure aresenic?

• 2.75 x 10²² atoms

• 1.72 x 10²³ atoms

• 5.77 x 10²³

• 3.66 x 10²² atoms As

According to Coulomb's Law, which peak would experience the greatest force of attraction to the nucleus in this PES?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Which element is the most electronegative?

• Potassium

• Fluorine

• Neon

• Selenium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element has the smallest atomic radius?

• potassium

• Fluorine

• Neon

• Selenium

Tags

NGSS.HS-PS1-1

Which chemical formula would be expected for one formula unit of Aluminum Sulfide?

• AlS

• Al₃S₂

• Al₂S

• Al₂S₃