5
3 items (or people) can line up in 6 different sequences. 6 items (or people) can line up in 720 different sequences.
two bonds and eight lone pairs
To arrange 3 distinct items, you can use the factorial of the number of items, which is calculated as 3! (3 factorial). This equals 3 × 2 × 1 = 6. Therefore, there are 6 different ways to arrange 3 distinct things.
15C3 = 455
35,280
5
3 items (or people) can line up in 6 different sequences. 6 items (or people) can line up in 720 different sequences.
Eight of them.
No.
two bonds and eight lone pairs
forty eight
The number of different ways that you can arrange 15 different items is given by the permutations of 15 things taken 15 at a time. That is 15 factorial, or 1,307,674,368,000.
15C3 = 455
Eight has two factor pairs. Including their negative counterparts, that makes four pairs.
There are 40,320 ways to arrange eight letters. In this case, around sixty of those ways will result in English words.
Eight pairs.