Answer:
what I got was 0.8435160945347224 moles
Answer:

Explanation:
The unbalanced nuclear equation is

Let's write X as a nuclear symbol.

The main point to remember in balancing nuclear equations is that the sums of the superscripts and of the subscripts must be the same on each side of the reaction arrow.
Then
235 = 4 + A , so A = 235 - 4 = 231, and
92 = 2 + Z , so Z = 92 - 2 = 90
And your nuclear equation becomes

Element 90 is thorium, so

Atoms must gain or lose electrons in order to become ions if they are to form ionic bonds.
Answer:
Period
Explanation:
horizontal is a period and verticle is a group