-5.
-5 * 2 = -10
-10 + 17 = 7
Answer:
A. The spectrum shows a single electron in the 2p subshell.
Explanation:
The crackling sound Is mainly to do with chemistry, The fireworks are filled with lead oxide, which turns into lead atoms as the firework explodes and heat up—— whistling sounds, the whistle is down to the tube being narrow one, thus rockets make a whistling noise
The answer is 1.88·10^-3 mg.
Double Replacement Reaction
