how many doberiegners triads are there??
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it is a group of 3 elements
the slements in the group r similar to each other by appearance and reactions
doberiegner a scientist said that the atomic weight of the middle element is similar to the average of the atomic weights of the other 2 elements
the slements in the group r similar to each other by appearance and reactions
doberiegner a scientist said that the atomic weight of the middle element is similar to the average of the atomic weights of the other 2 elements
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lithium-sodium(23)-(7+39)/2=23
li -Na
calcium(40)-strontium(87.5)-(40+137.5)/2=88.75
li -Na
calcium(40)-strontium(87.5)-(40+137.5)/2=88.75
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