The sum is 93.
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∙ 6y ago13 + 16 + 18 + 20 + 21 + 26 + 27 + 27 + 28 + 36 + 39 + 42 + 43 = 356
28 + 13 = 41
It is an algebraic expression which equals a + 28.
The 'n'th term is [ 13 + 5n ].
It is: 5n+3 and so the next term is 28
8, 13, 18, 23, 28, etc.
13
13 + 16 + 18 + 20 + 21 + 26 + 27 + 27 + 28 + 36 + 39 + 42 + 43 = 356
No element or ion as stated can exist, because if it contains 23 protons and only 18 electrons, its net charge must be 23 - 18 = 5 plus, not 3 plus.
9 2/3
28 + 13 = 41
It is an algebraic expression which equals a + 28.
The 'n'th term is [ 13 + 5n ].
The 'n'th term is [ 13 + 5n ].
It is: 5n+3 and so the next term is 28
The 'n'th term is [ 13 + 5n ].
-28