A sample of matter must be Nickel-57 (Ni) if... * Each atom in the sample has a mass of 57 amu.
Each atom in the sample has 28 protons.
Each atom in the sample is capable of conducting electricity.
O Each atom in the sample has an electron configuration of 2-8-16

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.

honesty and integrity.

inspire others.

commitment and passion.

good communicator.

decision-making capabilities.

accountability.

delegation and empowerment.

creativity and innovation.

here are the traits of a good leader.i'm not going to give you the examples so you can copy right it.that's illegal but i hope that this you out.