Atomic structure of a sodium ion :
Explanation :Sodium atom have 11 electrons ,thus we have to draw 3 rings around the word"Na" and the "x" on each of the ring. The "Na" which is the word at the center of the ring is the atom/element.The rings represents electron shells and the "x" represents the electrons. The first ring are only allowed to have a maximum of 2 electrons. While the others can be drawn up to 8 maximum. Sodium atom have 11 electrons, which means we have to draw 3 rings and 11 "x" . Easier explanation is by following the electronic configuration. Sodium atom electronic configuration is [2.8.1]. The first number represent the first ring, second number is the second ring. The number represent the number of electron on that ring.
Sodium ion have 10 electrons, thus we have to draw 2 rings and 10 "x". Another word is 3 electron shells and 10 electrons. The reason why it only have 10 electrons because it is to make it stable. To be stable, it's valance shell have to reach the maximum number of electron. For sodium ion to be stable, it need to lose 1 electron.
2 comments:
i think you also explain to the learners how they can easily come to understand;the valences periods and group positions of elements in the periodic table.from the atomic structure itself
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