A student attempts to arrange four elements (as shown below) in order from most reactive to least reactive.
K (19, 38.10), Mg (12, 24.31), C (6, 12.01), He (2,4.00)
Is the arrangement correct, and why (or why not)?
(1 point)
Responses
Yes. An element’s reactivity decreases along with its atomic number.
Yes. An element’s reactivity decreases along with its atomic number.
Yes. An element’s reactivity decreases from left to right on the periodic table.
Yes. An element’s reactivity decreases from left to right on the periodic table.
No. An element’s reactivity decreases from right to left on the periodic table.
No. An element’s reactivity decreases from right to left on the periodic table.
No. An element’s reactivity decreases as atomic mass increases.
No. An element’s reactivity decreases as atomic mass increases.
No. An element’s reactivity does not necessarily decrease along with its atomic number or atomic mass. Reactivity is determined by the element's position on the periodic table and its electron configuration. In this case, the correct arrangement from most reactive to least reactive would be: K (potassium), Mg (magnesium), C (carbon), He (helium). Helium is the least reactive gas as it is a noble gas with a full outer electron shell, while potassium is the most reactive metal due to its tendency to lose one electron to achieve a stable electron configuration.
so the answer would be no, an element
s reactivity decreases from right to left on the periodic table
or
No. an element's reactivity decreases as atomic mass increases.
Yes, the correct answer would be:
No. An element’s reactivity decreases as atomic mass increases.