I guess, the most fundamental is their valency. This dictates how many times it can bond to other elements. Elements with the same valency often share similar properties with other elements with the same valency. The Periodic Table is divided into 8 rows (and a D block). Each of these 8 rows have elements with similar properties, related to their valencies.
chemical property
One important property of an element at room temperature is its state of matter, whether it is a solid, liquid, or gas.
A characteristic property of an element is its atomic number, which determines the element's identity on the periodic table. Each element has a unique number of protons in its nucleus, which is constant for that element regardless of its chemical state or conditions.
The smallest unit of Matter that retains the property of an element is the atom.
It depends on which element is being referred to.
Ununhexium is an element. And not a property.
Osmium is an element, it is not a property
Ununoctium is not a property; is is an artificial chemical element.
intensive property
Bromine is an element. It has both physical and chemial properties
No, color is not a characteristic property of an element. The color of an element can vary based on its form or the conditions it's exposed to, but it is not a defining characteristic of the element itself.
gold is an element