Answer:
why cant I see the picture on my screen
Answer:
ZnO(s)—ZnO(s)
Explanation:
i considered a reaction of physical change since nothing is affected and thesalt I'd not hydrated so no mass is lost through loss of water or escape of gases to atmosphere
here the reaction only changes colour yellow to white or vice versa
Answer:
Explanation:
Ground state electron configuration of potassium (K) is 1s2 2s2 2p6 3s2 3p6 4s1. The valency of the element is determined by electron configuration in the excited state. This electron configuration shows that the last shell of the potassium atom has an unpaired electron (4s1). So the valency of potassium is 1.
here is an attached photo with a detailed explanation, good luck!