Co2−3 draw the molecule by placing atoms on the canvas and connecting them with bonds. include all lone pairs of electrons. c c o o o o 0 - o o 0 - +- chonspfbrclixmore press tab to go to the structure. press alt+a to get to the bonds and electrons editor. press alt+p to get to the elements editor. press alt+m to get to the main menu. press alt+q to quit the application. charge was decreased to value -1.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

yes the answer is total mass in unchanged   : )

it was spontaneous.

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