How does thermal energy transfer when a slice of pizza is warmed in the microwave? Air currents cause particles in the pizza to circulate.
Direct contact of the pizza with the oven creates heat.
Electromagnetic waves transmit heat to the pizza.
Movement of particles in the microwave generate heat.

The answer is C.electromagnetic waves transmit heat to the pizza.

Explanation:

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

the ratio of the conjugate base to the acid required to attain the desired ph.