They cannot be divided and still keep the properties of the element; option D.
The elephant have the greatest mass; option A
Atoms are the smallest particle of an element that can take part in a chemical reaction.
Atoms of the same element have the same atomic number or the same number of protons.
Atoms of elements cannot be divided and still keep the properties of the element.
The atoms of calcium, gold, argon, iodine will have the following features in common: they cannot be divided and still keep the properties of the element; option D.
Mass of a substance is the amount of matter present in that substance.
The elephant will have the greatest mass of the other animals.
In conclusion, atoms are the smallest particle of a substance that can take part in a reaction.
Learn more about atoms and mass at: https://brainly.com/question/6258301
#SPJ1