Electron Configuration REVIEW

Reorder the following:

• 1s²

• 3p⁶

• 2s²

• 3s²

• 2p⁶

The complete electron configuration for aluminum: ​ (a)   ​ (b)   ​ (c)   ​ (d)   ​ (e)  

• 2s2
• 2p6
• 3s2
• 3p1
• 1s2
• 1s3
• 2p2
• 3d2
• 2s1
• 2p1

Click all the places you would stop and write on your way to sodium:

Select all configurations that show an atom in the excited state:

Calcium's final configuration is

Match the following

• oxygen

• 1s² 2s² 2p⁶ 3s² 3p²

• magnesium

• 1s² 2s² 2p⁶

• neon

• 1s² 2s² 2p⁴

• potassium

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

• silicon

• 1s² 2s² 2p⁶ 3s²

An electron configuration is like an element's address. It tells you 3 things about the element: the ​ (a)   tells you what period its in, ​ (b)   tells you what block its in, and ​ (c)   tells you how many ​ (d)   are in the orbital. Every configuration starts the same, with ​ (e)   .

• big number in front
• the letter
• the exponent
• electrons
• 1s2
• small number
• neutrons
• 1s1
• 2s2

Label the three parts of an electron configuration:

d

e

f

electrons

section

block (orbital)

protons

group

period (row)

family

Match the following

• e

• c

• d

• a

• f

• b

What happens to the electrons of an atom when it absorbs heat or energy?

• The electrons become stable

• The electrons get excited

• The electrons are released from the atom

• The electrons combine with protons