Exploring Atomic Structure and Electron Configurations

What information do electron configurations provide about electrons?

• Exact location of electrons

• Probable location of electrons

• Atomic mass

• Number of protons

Which group of elements is being discussed when mentioning hydrogen, lithium, sodium, and potassium?

• Group 2A

• Group 3A

• Group 7A

• Group 1A

What is the common valence electron configuration for Group 1A elements?

• D1

• S2

• S1

• P1

What does the octet rule primarily focus on?

• Half-filled orbitals

• Core electrons

• Full shells

• Eight electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Why do elements move on to the valence shell after filling core electrons?

• Valence electrons are more stable

• Core electrons are stabilized

• Core electrons are unstable

• Valence electrons are less stable

Tags

NGSS.HS-PS1-1

What is the most likely ion for lithium?

• Lithium+7

• Lithium-7

• Lithium-1

• Lithium+1

What is an isoelectric electron configuration?

• Same number of protons

• Same number of neutrons

• Same atomic mass

• Same electron configuration as noble gases

Tags

NGSS.HS-PS1-1

Which elements are included in Group 7A?

• Carbon, Nitrogen, Oxygen, Phosphorus

• Helium, Neon, Argon, Krypton

• Fluorine, Chlorine, Bromine, Iodine

• Hydrogen, Lithium, Sodium, Potassium

What is the common valence electron configuration for Group 7A elements?

• S1

• S2 P5

• S2 P6

• P5

Why are halogens more likely to gain one electron?

• To become more reactive

• To achieve a noble gas configuration

• To lose seven electrons

• To become cations