- The crossword clue 'One of two or more atoms with the same atomic number that contain different numbers of neutrons' published 5 time⁄s and has 1 unique answer⁄s on our system. Check out 'Mirror quiz' answers for TODAY!
- The atoms of a chemical element can exist in different types. These are called isotopes.They have the same number of protons (and electrons), but different numbers of neutrons.Different isotopes of the same element have different masses. Mass is the word for how much substance (or matter) something has.Things with different masses have different weights.
- Have the same number of neutrons, but different numbers of protons.Response times vary by subject and question complexity. Median response time is 34 minutes and may be longer for new subjects. Solution is a homogeneous mixture. Can you give an example of a gaseous homogeneous mixture?
- Explain what isotopes are and how an isotope affects an element's atomic mass.
- Determine the number of protons, electrons, and neutrons of an element with a given mass number.
An Example: Hydrogen Isotopes
- What is the atomic number and the mass number of an isotope of lithium containing 3 neutrons?
- What is the atomic number and the mass number of an isotope of lithium containing 4 neutrons?
Protons Neutrons And Electrons
Stability of Isotopes
Atoms Protons Neutrons Electrons Worksheet
- (^{60}_{27}ce{Co})
- Na-24
- (^{45}_{20}ce{Ca})
- Sr-90
- Answer a:
- 27 protons, 27 electrons, 33 neutrons
- Answer b:
- 11 protons, 11 electrons, 13 neutrons
- Answer c:
- 20 protons, 20 electrons, 25 neutrons
- Answer d:
- 38 protons, 38 electrons, 52 neutrons
Summary
- The number of protons is always the same in atoms of the same element.
- The number of neutrons can be different, even in atoms of the same element.
- Atoms of the same element that contain the same number of protons, but different numbers of neutrons, are known as isotopes.
- Isotopes of any given element all contain the same number of protons, so they have the same atomic number (for example, the atomic number of helium is always 2).
- Isotopes of a given element contain different numbers of neutrons, therefore, different isotopes have different mass numbers.
Contributions & Attributions
Isotopes Are Atoms With The Same Number Of Protons But Different Numbers Of Neutrons
- CK-12 Foundation by Sharon Bewick, Richard Parsons, Therese Forsythe, Shonna Robinson, and Jean Dupon.
- Marisa Alviar-Agnew (Sacramento City College)
- Henry Agnew (UC Davis)
Isotopes
Concept Question: What is an isotope?
How To Find Neutrons Of An Isotope
The basic structure of the atom is a nucleus surrounded by electro-magnetic fields in which moving electrons reside. Inside the nucleus reside nucleons: neutrons and protons. When an atom is characterized by a unique number of nucleons, we refer to it as a nuclide. Different numbers of neutrons and/or protons result in different nuclides.
If two atoms have different numbers of protons, they are different elements. However, if two atoms have the same number of protons, but different numbers of neutrons we refer to them as isotopes.
Atoms With The Same Number Of Protons But Different Numbers Of Neutrons In The Nucleus Of An Atom
Two terms we use to identify nuclides (isotopes) are atomic number and mass number. Two atoms with the same atomic number, but different mass numbers (same number of protons, different number of neutrons), are called isotopes, or isotopic nuclides.
Having different numbers of neutrons changes the mass of these atoms, so isotopes have slight variations in their physical and chemical behavior. Some elements have many different isotopes, some only have a few, and some have no stable isotopes at all.
A particular isotope can be described in several ways. If we were discussing the isotopes of carbon and wanted to specify the isotope with a mass number (A) of 12 we would say 'carbon twelve,' and this could be written as carbon-12, or in a symbolic form with the mass number as a superscript: 12C. This symbolic form can also include the atomic number (Z) as a subscript, as in .