All the elements of a family in the periodic table have what feature in common?

What does the symbol (–hfus) indicate in a phase change?

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has:

In an exothermic reaction, energy may be released to the surroundings in the form of question 4 options: heat light thermal all of the above