2025年1月18日 · 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 identical chemical behavior but with different atomic masses and physical properties. Every chemical element has one or more isotopes. Why do isotopes have different properties?

2019年9月13日 · Isotopes are forms of an element that have different numbers of neutrons. All isotopes of an element have the same atomic number and number of protons, but they have different atomic masses from each other. Isotopes of an element share similar chemical properties, but have different nuclear properties. Every element has isotopes.

Isotopes are distinct nuclear species (or nuclides) of the same chemical element. They have the same atomic number (number of protons in their nuclei) and position in the periodic table (and hence belong to the same chemical element), but different nucleon numbers (mass numbers) due to different numbers of neutrons in their nuclei.

2022年8月19日 · Atoms with the same number of protons but different numbers of neutrons are called isotopes. They share almost the same chemical properties, but differ in mass and therefore in physical properties. There are stable isotopes, which do not emit radiation, and there are unstable isotopes, which do emit radiation. The latter are called radioisotopes.

What are Isotopes? Atoms are composed of a cloud of electrons surrounding a dense nucleus that is 100,000 times smaller and comprised of protons and neutrons. The number of protons(i.e., atomic number, "Z") determines the element; for example, a strontium nucleus always has 38 protons, and a rubidium nucleus always has 37.

The isotopes of a chemical element are a group of atoms that have the same atomic numbers but different mass numbers. This implies that all isotopes of an element have the same number of protons in their atomic nuclei and the same number of …

2024年9月22日 · 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 element in which the number of protons remains constant, but the neutron count varies. For example, the hydrogen element has three isotopes:

All aspects are covered: mineralogy, major- and trace-element compositions, and isotope (radiogenic and stable) geochemistry. This is no doubt related to the increased interest in gas centrifuges as a means of separating uranium isotopes. When using carbon, however, the carbon 11 isotopes produced by fragmentation are positron emitters.

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 atomic number on the Periodic Table.

2021年9月2日 · Chemical elements can exist as two or more isotopes that have different numbers of neutrons in the nucleus. For example, while carbon always has six nuclear prot. 化学元素可以作为两种或更多的同位素存在，这些同位素在原子核中具有不同数量的中子。 例如，虽然碳总是有六个质子，但它以三种不同的自然存在的同位素存在，有六个、七个或八个中子。 这些同位素通常被写成碳-12、…