From left to right, the isotopes are protium (1 H) with 0 neutrons, deuterium (2 H) with 1 neutron, and tritium (3 H) with 2 neutrons. Isotopes are distinct nuclear species (or nuclides) of the …

Dec 12, 2025 · What is an isotope? An isotope is one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly …

Sep 13, 2019 · An isotope is one of two or more forms of an element that have the same number of protons but different numbers of neutrons in the nucleus. Because they have the same …

Isotopes are atoms of the same element that have the same number of protons (i.e., atomic number, "Z") but a different number of neutrons, meaning that their mass number, "A", varies. …

Aug 19, 2022 · Like everything we see in the world, isotopes are a type of atom, the smallest unit of matter that retains all the chemical properties of an element. Isotopes are forms of a …

An isotope is an atom that has the same number of protons and a different number of neutrons. The atom is still considered the same element (still contains the same number of protons) as …

Learn what isotopes are, how they differ by neutrons, and how to write isotope notation in this clear, student-friendly chemistry lesson.

Isotopes are atoms that have the same number atomic number, but different mass numbers due to a change in the number of neutrons. The three isotopes of carbon can be referred to as …

Among their distinct physical properties, some isotopes (known as radioisotopes) are radioactive because their nuclei emit radiation as they strive toward a more stable nuclear configuration. …

Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons. The number of protons in a nucleus determines the element’s …

The meaning of ISOTOPE is any of two or more species of atoms of a chemical element with the same atomic number and nearly identical chemical behavior but with differing atomic mass or …

Nov 1, 2025 · isotope (plural isotopes) (nuclear physics) Any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within …

Sep 22, 2024 · Definition: Atoms of an element which have the same atomic number but different mass numbers are called isotopes of that element. These isotopes are variants of the same …

Feb 4, 2020 · Isotopes are samples of an element with different numbers of neutrons in their atoms. The number of protons for different isotopes of an element does not change. Not all …

Different isotopes of an element have different numbers of neutrons. As a result, they also have different mass numbers, which is the number of protons plus the number of neutrons. [2] . An …

Isotopes of the same element have the same number of protons but different numbers of neutrons, resulting in different atomic masses. Isotopes can be stable or unstable …

ISOTOPE definition: any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons …

When we talk about an isotope, we distinguish a type of atom that has the same number of protons but a different number of neutrons. Inside the atomic nucleus, the number of protons …

Radioactive isotope, any of the species of the same chemical element that have different masses and unstable nuclei that emit radiation.

Jan 2, 2013 · Isotopes are atoms whose atomic nuclei have the same number of protons but a different number of neutrons. Not all atoms of the same element are identical and each of …

Unstable isotopes are the ones which undergo radioactive decay and in the process, change into other elements. Some unstable isotopes have very short half lives (less than a nanosecond), …

isotope , One of two or more species of atoms of a chemical element having nuclei with the same number of protons but different numbers of neutrons.

Carbon (6 C) has 14 known isotopes, from 8 C to 20 C as well as 22 C, of which only 12 C and 13 C are stable. The longest-lived radioisotope is 14 C, with a half-life of 5700 years. This is also …

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1 day ago · Oxygen isotopes data enable researchers to look far back into the geologic past and reconstruct the climate of the past. In doing so, they consider several factors such as ocean …