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As the elements in Group 17 are considered in order of increasing atomic number, the chemical reactivity of each successive element
(1) decreases
(2) increases
(3) remains the same

Sagot :

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It decreases, because there is less attraction between the outermost shell and the nucleus - called the shielding effect - meaning it's harder for the element to attract the last electron

As the elements in Group 17 are considered in order of increasing atomic number, the chemical reactivity of each successive element decreases.

What is reactivity?

The impetus for a chemical substance to undergo a chemical reaction, either by itself or with other materials, with an ease and overall release of energy is referred to as reactivity.

Group 17 are the halogens group and on moving from top to bottom across that group atomic size of the atoms increases due to the increase in the number of energy shells. As a result of which it decreases the affect of nuclear attraction force to the outer most valence shell decreases.

Hence, reactivity decreases.

To know more about reactivity, visit the below link:

https://brainly.com/question/11865442

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