An atom has 53 neutrons and and 46 protons in its nucleus. 45 electrons are contained in the orbitals outside the nucleus. Write the nuclear symbol
for this atom.

Two liquids are poured into a beaker. after a few seconds, the beaker becomes warm. which of the following best describes this reaction? a. an exothermic reaction b. a decomposition reaction c. an endothermic reaction d. a single-displacement reaction