Which of the following relations is correct for exothermic and endothermic reactions?

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

How does a hydroelectric power plant converts energy into energy.

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.