Any characteristic of an element is called a

Property

Explanation:

Any characteristics of an element is called a property.

Property is defines as the characteristics of an element which gives information about nature of  an element.

Property of an element are of two types

1. Physical property

2. Chemical property.

1. Physical property:It is defines as the property in which no chemical reaction takes place .When we see an element that feature can see simply.

For example, a potassium element can be  cut by knife . It is physical property of potassium element, because there is no chemical reaction takes place.

2. Chemical property : It is defined as the property  in which  chemical reaction takes place.When the element react with any other particles or molecule then it involve changes and the changes can be seen but the changes how happened can not bee seen

For an example, when potassium kept in air then it catches fire because the potassium reacts with air and form potassium oxide.

But we can not how this happened.

Property.

the answer is definitely a