Kuster ~ Electron Configuration ~ Excited / Ground

Which ion has the same electron configuration as an atom of He?

• H^–

• Na⁺

• O^2–

• Ca²⁺

Tags

NGSS.HS-PS1-1

Which particle has the same electron configuration as a potassium ion ~ K⁺?

• fluoride ion

• sodium ion

• neon atom

• argon atom

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which is an electron configuration for an atom of chlorine in the excited state?

• 2–8–7

• 2–8–8

• 2–8–6–1

• 2–8–7–1

Tags

NGSS.HS-PS1-1

Which electron configuration represents the electrons of an atom in an excited state?

• 2–4

• 2–6

• 2–7–2

• 2–8–2

Which electron configuration represents the electrons of an atom in an excited state?

• 2–8–1

• 2–8–6

• 2–8–17–6

• 2–8–18–5

Which electron configuration represents an atom of aluminum in an excited state?

• 2-7-4

• 2-7-7

• 2-8-3

• 2-8-6

Tags

NGSS.HS-PS1-1

An atom has an atomic number of 9, a mass number of 19, and an electron configuration of 2–6–1.

What is the total number of neutrons in this atom?

• 10

• 9

• 7

• 11

Tags

NGSS.MS-PS1-1

An atom has an atomic number of 9, a mass number of 19, and an electron configuration of 2–6–1.

Why do the number of electrons in the second and third shells shows that this atom is in an excited state.

• Electrons will tend to fill the lower energy orbitals before the higher energy orbitals.

• Electrons will tend to fill the higher energy orbitals before the lower energy orbitals

• This atom is NOT in an excited state.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which electron configuration could represent a strontium atom in an excited state?

• 2–8–18–7–1

• 2–8–18–7–3

• 2–8–18–8–1

• 2–8–18–8–2

Tags

NGSS.HS-PS1-1

Write an electron configuration for an atom of aluminum-27 in an excited state.

• 2-8-3

• 2-8-15-2

• 2-7-3

• 2-8-14-3

Tags

NGSS.HS-PS1-1