Identify the following elements based on their electron configurations: a. 1s² 2s² 2p²

• Carbon

• Nitrogen

• Oxygen

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Identify the following elements based on their electron configurations: b. 1s² 2s² 2p⁴

• Carbon

• Nitrogen

• Oxygen

Tags

NGSS.HS-PS1-1

As you go down a group on the periodic table, atomic radius __________.

• Increases

• Decreases

Which has a larger atomic radius? Li or Rb?

• Rb
• Li

Tags

NGSS.HS-PS1-1

Going left to right across a period, what happens to atomic radius?

• It increases as protons are added to the nucleus

• It decreases as protons are added to the nucleus

• Atomic radius stays consistant across a period

Which has a larger atomic radius? Na or Ar?

• Na
• Ar

Tags

NGSS.HS-PS1-1

Positive ions (cations) are _____________(larger or smaller) than the original parent ion.

• Larger because they gained electrons

• Smaller because they gained electrons

• Smaller because they lost electrons

Negative ions (anions) are _____________(larger or smaller) than the original parent ion.

• Larger, they have lost electrons

• Larger, they have gained electrons

• Smaller, they have lost electrons

• Smaller they have gained electrons

Ionization energy is the energy needed to ________________ (add/remove) an electron from an atom.

• Remove

• Add

Tags

NGSS.HS-PS1-2

Across a period, ionization energy ________________ (increases/decreases) because the number of protons in the nucleus ________________ (increases/decreases) and pulls ________________ (more/less) on electrons in the electron cloud.

• increases, increases, more

• decreases, increases, less

• decreases, increases, more

• decreases, decreases, more

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2