{ 1, -2, 4, -8, 16, __}

identify the missing term

The pattern in the sequence is multiplying each term by -2.

1 * -2 = -2
-2 * -2 = 4
4 * -2 = -8
-8 * -2 = 16

Thus, the next term in the sequence would be 16 * -2 = -32.

Therefore, the missing term is -32.