Final answer:
Two samples of mercury share the same properties because they are made of the same type of mercury atoms, which is why they are identical at the atomic level and display the same chemical and physical characteristics. Mass and weight are distinct concepts, and gold has the symbol Au on the periodic table The correct option B).
Step-by-step explanation:
The question asks why two samples of mercury share the same properties. The correct answer is B) They are made of the same type of atoms. This aligns with the fundamental concept that all matter is composed of atoms and that atoms of the same element are identical. Therefore, samples of mercury share the same properties because they consist of mercury atoms.
It is important to note that mass and weight are not synonyms; mass is the amount of matter in an object, while weight is the force exerted on that mass by gravity. Additionally, atoms are not formed by molecules bonding together; rather, it is the other way around where atoms bond together to form molecules. It is also noteworthy that the periodic table symbol for gold is Au, not Gd.
Mercury is unique among metals because it remains in a liquid state at room temperature and has a high surface tension. These properties are due to the nature of the atomic interactions and the energy of the particles.