Electron Arrangement

How many electrons can the first energy level hold?

• 1
• 2
• 8
• 0

What is the maximum number of electrons in the second energy level?

• 18
• 8
• 32
• 2

What are Valence electrons defined as ?

• as electrons in the atom's outermost orbitals. 
• as electrons in the atom's innermost orbitals.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is electron configuration ?

• the arrangement of protons in an atom.
• the arrangement of electrons in an atom.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Identify the element with the electron arrangement 2,8,2

• Neon

• Sodium

• Magnesium

• Aluminium

Identify the element with the electron arrangement 2,8,8

• Neon

• Argon

• Helium

• Chlorine

Which element will form a positive ion with the electron arrangement 2,8 ?

• Fluorine

• Neon

• Sodium

• Lithium

Which element will form a negative ion with the electron arrangement 2,8 ?

• Fluorine

• Neon

• Sodium

• Lithium

Tags

NGSS.HS-PS1-1

Which element will form a positive ion of charge 2+ ?

• Lithium

• Magnesium

• Sodium

• Oxygen

Tags

NGSS.HS-PS1-1

NaCl consists of sodium ions ____ and chlorine ions _____

• Na and Cl

• Na⁺ and Cl⁺

• Na⁺ and Cl^-

• Na^- and Cl⁺