In a science lab, a teacher instructed students attach a piece of very fine steel wool to a clamp stand inside a fume hood. The students then lit a burner placed under the steel wool. The metal strands began to glow bright red and flames filled the steel After the burner was turned off, the metal continued to burn, leaving behind reddish brown strands that collapsed into a powder when it was touched after cooling . Based on these observations , did the steel wool undergo a chemical change or a physical change? Explain your answer.

answer; i believe that the correct answer is (c) explore the outer planets; / plz check good luck

catya your not at all which answer i've seen you do this on another question!

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.