A student heats up a metal and finds that its mass increases. The students says “this is because heat has been added.” Explain why this is incorrect. HELP DUE SOON. WILL GIVE BRAINLIEST

The increase in mass is not due to the heating but due to the reaction of the metal with oxygen in air to form an oxide

Explanation:

When a metal is heated in the presence of air, oxygen present in air reacts with the metal to form the oxide of the metal. The mass of this oxide is greater than the original metal by the amount of oxygen added to the metal during the reaction.

The above reaction is known as an oxidation reaction. Generally,

metal M + O2 ---> MO2

hey your not cool]      

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.