Iron (fe) has 26 protons and 30 neutrons which of the following is most likely atomic weight of iron a)26.84b)30.84c)55.84

The correct option is C

Explanation:

The atomic mass of an element can be determined by the addition of the atomic number of the element and the number of the neutrons present in the element. Atomic number is the number of protons present in the nucleus of an atom. Both the protons and neutrons are present in the nucleus of an atom. The mass of an atom is determined by the nucleus of the atom.

From the above, we can deduce that the atomic weight of Iron (Fe) is

26 protons + 30 neutrons = 56

Atomic mass of Fe is 56. From the options, it can be deduced that the closest to 56 is 55.84

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.

pv=nrt

explanation: