19. a geologist tests a rock containing calcium oxide by reacting it with hydrochloric acid. water and calcium chloride form.
which bonds break?
ca-o bonds in calcium oxide and h-o bonds in water
ca-o bonds in calcium oxide and h-cl bonds in hydrochloric acid
oh-o bonds in water and ca-cl bonds in calcium chloride
ca-cl bonds in calcium chloride and h-cl bonds in hydrochloric acid break

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8