How many electrons are in an atom of elemental sodium? a) equal to the number of neutrons b) equal to the number of protons c) equal to the number of protons and neutrons

correct answer is B) equal to the number of protons

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante

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