bullet 2: Yes, the difference in physical properties is caused by the different numbers of neutrons (which in turn affects relative mass). For example, carbon-14 is less stable than its isotope carbon-12, and hence radioactive. This difference forms the basis of carbon dating. If you have ...
Isotopes同位素 Although an element contains only atoms with the same atomic number, these atoms, however, may have different mass numbers. For example, there are three different kinds of carbon atoms. One has a mass number of 12 and the other two re...
Mass number, in nuclear physics, the sum of the numbers of protons and neutrons present in the nucleus of an atom. The mass number is commonly cited in distinguishing among the isotopes of an element, all of which have the same atomic number (number of p
Many of the elements on the periodic table have ‘isotopes’ that have the same chemical properties with different mass numbers. The different ratios of these isotopes can be measured in many of the chemical components that make up gases, oils, contaminants, and water. Often, the isotope ratios...
Isotopes and Atomic Mass SCH 3U Matter, Chemical Trends and Chemical Bonding B3.2,3.1 l What are Isotopes? Two atoms are isotopes if they have the same number of protons, but they have different numbers of neutrons. This means that: Isotopes are atoms of the same element. Isotopes have dif...
Isotopes Isotopes have differing numbers of neutrons, but the same number of protons. We can identify isotopes because the mass of the atom changes. Neon has 3 isotopes: Ne-20, Ne-21, and Ne-22. All have 10 protons, but Ne-20 has 10 neutrons, Ne-21 has 11 neutrons and Ne-22 has...
Allotropes are different forms of the same element with distinct physical or chemical properties; Isotopes are atoms of the same element with differing numbers of neutrons.
Theory: Relative atomic masses measured by chemical methods rarely produce whole numbers but they should do (allowing for the low relative mass of the electron). This was explained when the mass spectrograph revealed thatatoms of the same element could have different masses due to the variation in...
B A They have the same number of protons. B They have the same number of outer shell electrons. C They have different numbers of neutrons. D They have different mass numbers. 相关知识点: 试题来源: 解析 B 反馈 收藏
相关知识点: 试题来源: 解析 a. allotropes: two or more physical forms of an element in the same state.b. isotopes:Atoms of a particular kind of element that have different numbers of neutrons and therefore different mass numbers.反馈 收藏 ...