7. which of the following statements about connecting paragraphs is correct? a. you can't state an idea in paragraph 2 that's related to an idea in paragraph 1. b. a good connection between two paragraphs is an implied transition. c. two paragraphs may be joined by an action verb. d. you can use a pointing word in paragraph 2 that refers to a word in the paragraph 1.

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.

b is the correct answer

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