Question

There are three known forms of uranium. These forms are called _____ of each other. a. isotopes b. copies c. triplicates d. molecules

Answer 1

The answer is isotopes. Isotopes are different kind of atoms of the same element. Elements are identified by the number of protons in the nucleus (atomic number), so all the aoms of uranium have the same number of protons. When one element can have atoms with different number of neutrons (which is pretty normal) the different forms are called isotopes. So, isotopes are different versions of the same element which differentiate from each other in the number of neutrons.

Answer 2

There are three known forms of uranium. These forms are called isotopes of each other.

Step-by-step explanation:

The number of protons present in the nucleus of an atom is called the atomic number Z. But in the nucleus of each element it is also possible to find neutrons, the number of which can vary. The atomic mass (A) is obtained by adding the number of protons and neutrons in a given nucleus.

The atomic number of the same element cannot vary, because it confers identity on the atom. But the number of neutrons can vary. In other words, the same chemical element can be made up of different atoms, that is, their atomic numbers are the same, but the number of neutrons is different. These atoms are called isotopes of the element.

Since all the isotopes of an element have the same atomic number, they occupy the same place in the Periodic Table.