Covalent bonding (with an electronegativity difference below 0.5) results when fluorine bonds with
a. hydrogen.
b. fluorine.
c. potassium.
d. iodine

i think its b, but i wanted to make sure

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.