Modern atomic theory states that atoms are neutral. how is this neutrality achieved ? a. equal number of neutrons and protons b. equal number of protons and electrons c. more electrons than protons c. more neutrons than electrons

Option (B) is the correct answer.

Explanation:

An atoms consists of protons, neutrons and electrons. Protons are positively charged, neutrons have no charge and electrons are negatively charged.

Also, when an atom is neutral then there are equal number of protons and electrons.

For example, a neutral sodium atom has 11 protons and 11 electrons.

Therefore, we can conclude that modern atomic theory states that atoms are neutral as they have equal number of protons and electrons.

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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.