[🪗][✨][2️⃣➕]

#reactivity #ion #+2 charge #cation #group 2 #valence electrons

👥1️⃣⚡👥2️⃣

#group 1 #group 2 #team 1 #team 2 #teams

[2️⃣][🔥][🌈][🪗]

#flame test #spectroscopy #strontium #barium #calcium #group 2

1️⃣👥2️⃣👥

#group 1 #group 2 #team one #team two #numbered groups #squads #participants #first team #second team