Isotopes — Definition & Overview
Read this topicExplanations 6
- Understanding Isotopes When atoms of the same element have a different number of neutrons, they are called isotopes. All isotopes of an element differ only in mass number. Now, …
By Deena Hauze, Alex Federspiel, Mario Janakis, Gabi Slizewska
- What Are Isotopes? Isotopes are atoms of the same element that have different numbers of neutrons. Recall that neutrons are found in the nucleus of an atom and have zero charge.…
By Hannah Bonville, Alex Federspiel, Deena Hauze, Mario Janakis, Gabi Slizewska
- Atoms are organized by the number of protons in the nucleus: for example, if an atom has 8 protons, then it is Oxygen. Not all oxygen atoms have the same number of neutrons, tho…
By Srinivas Lade, Gabi Slizewska
- Using Isotopes to Date Fossils Have you ever wondered how scientists know how long ago dinosaurs lived? The answer lies in isotopes. As we learned in the sections about atoms an…
By Adrien, Gabi Slizewska, Mario Janakis, Alex Federspiel
- (Video) Isotopes by RicochetScience This quick video goes over what isotopes are, how they are different from the standard form of an element, and how scientists can use them to…
By Mario Janakis, Gabi Slizewska
- Stable and Unstable Isotopes Isotopes can both be very useful and dangerous to humans. Carbon-14 is an example of these useful isotopes and is the basis for how we perform radio…
By Tristan Gibbons, Gabi Slizewska
Problems 33
- How many neutrons does 23He_2^3He23He have?
- What is the atomic number?
- What happens to radioactive isotopes over time?
- How are isotopes of an atom similar?
- Which of the statements below is correct?
- Substance X and Substance Y are isotopes of the same element. What information from the chart above tells us this?
- The table above shows data on the atomic structure of 2 isotopes of the same element: Isotope M and Isotope N. Using this table, identify the incorrect statement from the choice…
- Which choice below shows atoms that are isotopes of the same element?
- Which of the following are differences between isotopes of the same element? Check all that apply.
- Neutrons have a ____________ charge and are found in the ____________ of the atom.
- What is the difference between the protium and deuterium isotopes of hydrogen?
- How many protons and neutrons are in 1^118^889_99 FFF?
- The radioactive isotope chromium-51 has a half-life of 28 days. Which of the following statements best describes what this means?
- Phosphorus-32 is an isotope of phosphorus used in medicine to detect eye tumors. How does phosphorus-32 differ from elemental phosphorus (shown in the picture above)?
- Based on the information above, which two atoms are isotopes of each other?
- Select each statement that directly supports that the elements in the picture are isotopes of each other.
- Which of the following isotopes have 8 neutrons? *The mass numbers are on top and the atomic numbers are on the bottom. Image Source: By Antonsusi (Own work) CC BY-SA 3.0, via W…
- Which of the following properties of radioactive isotopes show how they can be used a fuel?
- From the list below, select the properties of all isotopes.
- How do the three isotopes above differ? Select all that apply.
- How many neutrons are in 1^118^889_99 FFF?
- Carbon has 2 stable isotopes; carbon-12 and carbon-13. What is the difference between the two isotopes?
- Which two of the following choices are isotopes of each other?
- Nuclear reactors and weaponry function through the fission, and subsequent chain reaction, of large nuclei. If only the smaller isotope of Uranium is fissile, which is used in r…
- Which statement about 4296Mo^{96}_{42}Mo4296Mo is true?
- Mass spectrometry is a method of analyzing a sample based on the mass of the constituents. If the radius of curvature is given by equation below, which isotope of carbon will tr…
- We are told that an atom has a mass of 14 daltons. If the atom is not radioactive, which atom is it?
- A certain radioisotope has a half-life of 3 days. If there are initially NNN atoms, how many are left on the 6th day?
- What is the difference between carbon-14 and nitrogen-14?
- Oxygen-22 is a radioactive isotope of oxygen with a half life of 2.25 seconds. How much of a 100 gram sample of 22O^{22}O22O would remain after 9 seconds?
- Mercury-210 is a radioactive isotope of mercury, Hg, with a half life of 10 minutes. How much of a 100g sample will remain within an hour?
- A given isotope is written as 817X^{17}_{8}X817X. What is the identity of X?
- Using the graph above, which isotope is most likely to be stable?