Which explanation best finishes this sentence? Intensity is the measure of... 1. the amount of energy in sound waves.

2. how close the waves are together vertically (side to side).

3. the total amount of change from one wave to the next.

Either 1. the amount of energy in sound waves.

or 3. the total amount of change from one wave to the next.

Tell me which one is right please.

1?

Explanation:

true

hope that

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.