Which of the following list all the elements that are present in a molecule of posasslum carbonate K2CO3 A)carbon and oxygen

B)phosphate and calclum

C)potassium, carbon, and calcium

D) phosphate oxygen calcium

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

the answer is d. matter from the air combined with the steel wool.

a basic emergency supply kit could include the following recommended items: water - one gallon of water per person per day for at least three days, for drinking and sanitation. food - at least a three-day supply of non-perishable food. battery-powered or hand crank radio and a noaa weather radio with tone alert.