Periodic Trends & Electron Configuration

What is the electron configuration of oxygen?

• 1s2 2s2 2p2

• 1s2 2s2 2p6

• 1s2 2s2 2p3

• 1s2 2s2 2p4

Which two trends follow the exact same pattern and are completely opposite atomic radius?

• nuclear charge & shielding effect

• electronegativity & ionization energy

• shielding effect & ionization energy

• nuclear charge & electronegatvity

What is ionization energy?

• The energy of attraction to electrons of an element in a bond

• The decrease in attraction between the nucleus and valence electrons due to core electrons

• The amount of energy required to remove an electron from an atom.

• Half the distance between the nuclei of two atoms of the same element

Tags

NGSS.HS-PS1-2

Which element has the highest ionization energy: helium, neon, or argon?

• neon

• argon

• hydrogen

• helium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element has the highest electronegativity: fluorine, chlorine, or bromine?

• chlorine

• bromine

• oxygen

• fluorine

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the shielding effect?

• Increase in attractive force between nucleus and valence electrons

• The process of adding valence electrons to an atom

• The process of removing valence electrons from an atom

• Reduction in attractive force between nucleus and valence electrons

Which element has the highest shielding effect: lithium, sodium, or potassium?

• helium

• sodium

• potassium

• lithium

Tags

NGSS.HS-PS1-1

What is the electron configuration of nitrogen?

• 1s2 2s2 2p4

• 1s2 2s2 2p5

• 1s2 2s2 2p2

• 1s2 2s2 2p3

Tags

NGSS.HS-PS1-1

Which element has the smallest atomic radius: helium, neon, or argon?

• neon

• argon

• oxygen

• helium

Tags

NGSS.HS-PS1-1

Electrons occupy orbitals of lowest energy first is part of what electron configuration rule?

• Hund’s Rule
• Aufbau Principle
  
• Pauli Exclusion Principle