How is this person able to stay on the skateboard? explain

How many ions that have a +1 charge will bond with an ion that has a -2 charge

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.

Which compound contain an iron with a 3+ charge