An old movie poster used a quote "in space, no one can hear you scream! " why this is true or not true? a) the quote is incorrect, you can hear sound in outer space. b) sound cannot be polarized. so, you cannot hear sound in space. c) sound is an electromagnetic wave and needs no medium to travel through. eliminate d) sound needs a medium for the wave to vibrate and there is nothing in space to vibrate

D) Sound needs a medium for the wave to vibrate and there is nothing in space to vibrate

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