Metals show a wide range of chemical behavior. give examples of that variation by describing some common properties of calcium, gold, iron, and sodium.

Explanation:

Atomic number of sodium is 11 and it is a group 1 element. Hence, it is most reactive in nature.

Some properties of sodium are as follows.

Atomic number of calcium is 20 and it is a group 2 element. Some properties of calcium are as follows.

Atomic number of iron is 26 and it is a d-block element. Therefore, it is also known as transition element.

Some properties of iron are as follows.

Atomic number of gold is 79 and it is also a transition element. A property of gold is that it does not react easily with other substances.

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.