Methyl orange and phenolphthalein are common chemical indicators often used in titrations. What is the role of a chemical indicator in this context?

As you move from right to left on the periodic table the atomic radius fill in the blank

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Why is carbon ideal for making different compounds?