GENCHEM Activity 1.1

Atomic number of oxygen

Outermost shell of atom

Valence electrons of Sodium

Meaning of D in LEDS.

P in SPDF means...

Tells the location of an electron in an atom.

• Atomic number

• atomic mass

• electron configuration

Maximum number of atoms S subshell can hold.

Maximum number of electrons F subshell can hold.

What element has an electron configuration of 1s²2s²2p²?

• Calcium

• Sodium

• Carbon

What element has an electron configuration of 1s²2s²2p⁶3s¹?