Which pair of atoms can form an ionic bond? A.

potassium (K) and fluorine (F)
B.

sodium (Na) and neon (Ne)
C.

fluorine (F) and chlorine (Cl)
D.

sodium (Na) and potassium (K)

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.