What happens to an endothermic reaction when an equilibrium system is heated? (5 points) a
The system shifts forward.

b
The system shifts backward.

c
The equilibrium does not shift to maximize the stress.

d
The equilibrium does not shift to restore original conditions.

a (the system shifts forward)

In which heating an endothermic reaction will cause the products to increase and the reactants to decrease.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)