Chemistry Jan 15 2026

Electron Configurations

100

1s²2s²

beryllium

200

1s²2s²2p⁶3s²3p¹

aluminum

300

[Ne]3s²3p³

phosphorus

400

[Kr]5s²4d⁹

silver

In reality: [Kr]5s¹4d¹⁰ because then the fourth energy level is completely filled

500

1s²2s²2p⁶3s²3p⁶4s²3d¹

scandium

How many neutrons

100

¹⁹F

10

atomic number of fluorine is 9: 19 - 9 = 10

200

carbon - 14

8

atomic number of carbon is 6: 14-6=8

300

⁴⁰Ca

20

atomic number of calcium is 20: 40-20 = 20

400

titanium - 46

24

atomic number 22: 46-22 = 24

500

¹H

0 neutrons

007

100

the type of bonding in copper wires

metallic

200

the type of bonding in calcium chloride

ionic

CaCl: metal and a non-metal

300

the way valence electrons are shared in metals is also called this

sea of electrons

400

the type of bonding in methane (CH₄)

covalent

500

bonds could not exist without these

valence electrons