4/2 He
element=> Helium
#protons=> 2
#neutrons=> 4
40/20 Ca
element=> Calcium
#protons=> 20
#neutrons=> 20
#electrons=> 20
19/9 F
element=> Fluor
atomic#=> 9
mass#=> 19
#electrons=> 9
maaf kalo salah. semoga membantu. jadikan jawaban tercerdas dan jgn lupa follow:)
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4/2 He
element=> Helium
#protons=> 2
#neutrons=> 4
40/20 Ca
element=> Calcium
#protons=> 20
#neutrons=> 20
#electrons=> 20
19/9 F
element=> Fluor
atomic#=> 9
mass#=> 19
#electrons=> 9
maaf kalo salah. semoga membantu. jadikan jawaban tercerdas dan jgn lupa follow:)