2006-08-05 18:17:52 · 8 answers · asked by maurice t 1 in Science & Mathematics ➔ Chemistry
Element number 92,uranium, is the last naturally occuring element.However, element Tc(technetium) is manmade and it is number 43. The rest are manmade, but not chemically, it is a nuclear reaction.There is space on our present periodic table for 118 elements. That would be elements with all electron energy levels filled.
2006-08-07 13:18:15 · answer #1 · answered by science teacher 7 · 0⤊ 0⤋
There may now and then be elements naturally created above 92. But so far as we know (I know), they're all unstable and decay to stable elements with A# < 92.
2006-08-06 06:24:38 · answer #2 · answered by Luis 4 · 0⤊ 0⤋
yes there are only 92 elemnts which are discovered. but I think there are some more elements
2006-08-06 02:12:20 · answer #3 · answered by mmaakkaa789 1 · 0⤊ 0⤋
I do not remember how many elements there were on the periodic chart, but that is how many there are if you count them.
2006-08-06 01:26:43 · answer #4 · answered by Tony T 4 · 0⤊ 0⤋
Yes the rest are synthesized chemically.
2006-08-06 01:22:45 · answer #5 · answered by mascot3502 2 · 0⤊ 0⤋
ya ,u r right,others are radioactive,not found on nature,they are formed due to nuclear decay or due to nucleus unstability
2006-08-06 01:39:19 · answer #6 · answered by ghulamalimurtaza 3 · 0⤊ 0⤋
Yes that is true... but is this suppose to be a question?
2006-08-06 01:22:34 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Yes, that is true.
2006-08-06 01:21:18 · answer #8 · answered by Anonymous · 0⤊ 0⤋