Question

looking at the same nonmetal group on the periodic table, how does the reactivity of an element in period 2 compare to the reactivity of an element in period 4?
the period 2 element would be more reactive because the attractive force of protons is stronger when there are fewer neutrons interfering.
the period 2 element would be more reactive because the attractive force of protons is stronger when electrons are attracted to a closer electron shell.
the period 4 element would be more reactive because the attractive force of protons is stronger when there are more neutrons helping.
the period 4 element would be more reactive because the attractive force of protons is stronger when electrons are attracted to a farther electron shell.

Explanation:

• Reactivity of non - metals: Non - metals gain electrons. The closer the outermost electron shell is to the nucleus (smaller atomic radius), the stronger the attractive force of protons on electrons.
• Period 2 vs Period 4: As we move down a group (from period 2 to period 4), the number of electron shells increases. So, electrons in period 4 elements are in a shell farther from the nucleus compared to period 2 elements.
• Electron - attracting ability: Elements in period 2 have a stronger attractive force of protons on electrons (because of the closer electron shell) and are more reactive as they can more easily attract electrons.

Answer:

The period 2 element would be more reactive because the attractive force of protons is stronger when electrons are attracted to a closer electron shell.