Group 8a (also referred to as group 18) elements on the periodic table share
which characteristics?
check all that apply.
o
a. nonreactive
o
b. noble gases
c. inert
d. metals

A, B, and C

Explanation:

Group 18 is the noble gases that were once known as inert gases because they are relatively unreactive.

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.