What are the 4 physical changes you can observe?

1. ice melting 

2. temperature going down at night 

3. water evaporating (like a towel drying out) or water drop on the sink 

4. dew forming on the mirror after a shower 

1. ice melting

2. ripping paper

3. dew on mirror because of shower

4. breaking glass

Order of filling levels and sublevels of electrons: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²3f¹⁴5d¹⁰6p⁶for an element with 5 electrons in the 3d energy level: full configuration: 1s²2s²2p⁶3s²3p³.