Why is baking soda a ionic compound?

The formula for baking soda is NaHCO3, or sodium bicarbonate. Bicarbonate is a polyatomic ion with a charge of -1 just because of the way it's structured (we haven't learned exactly how it bonds because the goal of ionic compounds is usually to get a neutral charge; polyatomic ions are just ones you have to memorize). All polyatomic ions bond ionically (aka they give/take electrons to get to a full outer shell of electrons, aka have 0 valence electrons). Since sodium (Na) has an atomic charge of +1, it can "give" an electron to sodium bicarbonate and both are now neutrally charged and bonded ionically.

Just a side note for once you understand the fundamentals of ionic compounds: all polyatomic ions bond ionically, and all compounds involving a metal and a nonmetal are ionic (anything to the left of the "staircase" and anything to the right of the "staircase"). Hydrogen is an exception and can act as a metal or a nonmetal. Any two nonmetals form a molecular compound (they're bonded covalently), and that isn't based on charge. Best of luck!

There is one s orbital, and there are three p orbitals, five d orbitals, and seven f orbitals. thus, the answer is b. do not confuse the number of orbitals in a subshell with the number of electrons the subshell can hold. each orbital can hold two electrons, so the capacity of an nf subshell is 14 electrons.

Okay this will take 1 hour okay dont forget me.