2007-03-12 01:20:22 · 6 answers · asked by Kasra 2 in Science & Mathematics ➔ Chemistry
In the first electron shell, it can only contain 2 electrons. Therefore, it has a full valence (outermost) shell.
2007-03-12 01:28:03 · answer #1 · answered by true_wahoo 3 · 1⤊ 0⤋
noble gases have their outermost shells complete by having 2 electrons in it and in this way the noble gases are stable. this is known as duplet rule. all the noble gases are stable bec they have 2 electrons intheir outermost shells and they are stable. same is with helium bec it has 2 electron too.
2007-03-12 10:29:40 · answer #2 · answered by chill tracker 2 · 0⤊ 0⤋
HELIUM BEHAVES AS A NOBLE GAS BECAUSE OF ITS COMPLETE ATOMIC STRUCTURE. THE STRUCTURE OF HELIUM IS KNOWN AS DUPLET STRUCTURE.AS IT CONTAINS ONLY ONE ENERGY LEVEL THE K -SHELL,SO IT CAN HAVE ONLY THE MAXIMUM OF 2 ELECTRONS. SO HELIUM HAS ONLY 2 ELECTRONS.
2007-03-12 08:38:26 · answer #3 · answered by ramsundar 5 · 1⤊ 0⤋
Because the lowest level orbital only takes two electrons to fill.
2007-03-12 09:38:32 · answer #4 · answered by xox_bass_player_xox 6 · 0⤊ 0⤋
Because with only two protons, the valence shell is full with two electrons.
2007-03-12 08:27:38 · answer #5 · answered by Jack D 2 · 0⤊ 1⤋
because in that level of it's valence shell it only needs two electrons to complete it
2007-03-12 08:23:00 · answer #6 · answered by ky_devil_pup 3 · 0⤊ 1⤋