which quantity will always have a negative value? A) the total bond energy of the reactants in an endothermic reaction. B) the change in energy in a system during an endothermic reaction. C) the change in energy in a system during an exothermic reaction. D) the total bond energy of the products during an exothermic reaction

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

i think its 5049.

i hope this !

level 4 to level 2 : ))

answer; capital earns interest; entrepreneurship receives a profit or incurs a loss;