| 单词 | mass number |
| 例句 | According to passengers, the Boeing 777 made a sudden drop quickly and unexpectedly, causing a mass number of injuries to take place. Dozens injured, hospitalized after unusual turbulence on Turkish Airways flight to New York 2019-03-10T05:00:00Z Each contains a different number of protons and neutrons, giving it its own atomic number and mass number. Concepts of Biology 2013-04-25T00:00:00Z This continues up to A ≈ 60 , roughly corresponding to the mass number of iron. College Physics for AP Courses 2015-08-12T00:00:00Z If the atomic number and the mass number of all but one of the particles in a nuclear reaction are known, we can identify the particle by balancing the reaction. Chemistry 2019-02-14T00:00:00Z Together, the number of protons and the number of neutrons determine an element’s mass number, as illustrated in this figure. Biology for AP Courses 2022-06-09T00:00:00Z The total number of protons and neutrons in the nucleus of an atom is called its mass number. Miller & Levine Biology 2018-01-01T00:00:00Z The mass number, or atomic mass, is the number of protons plus the number of neutrons of that element. Concepts of Biology 2013-04-25T00:00:00Z The mass number is the number of protons plus the number of neutrons of that element. Environmental Biology 2018-09-06T00:00:00Z The number of neutrons is therefore the difference between the mass number and the atomic number: A – Z = number of neutrons. Chemistry 2019-02-14T00:00:00Z Note that the small contribution of mass from electrons is disregarded in calculating the mass number. Biology for AP Courses 2022-06-09T00:00:00Z The atomic number is reduced by one and the mass number remains the same. An Introduction to Geology 2017-01-01T00:00:00Z So the most common form of carbon’s mass number is 12. Anatomy and Physiology 2013-06-19T00:00:00Z Therefore, it is possible to determine the number of neutrons by subtracting the atomic number from the mass number. Environmental Biology 2018-09-06T00:00:00Z The iodine atoms are added as anions, and each has a 1− charge and a mass number of 127. Chemistry 2019-02-14T00:00:00Z This approximation of mass can be used to easily calculate how many neutrons an element has by simply subtracting the number of protons from the mass number. Biology for AP Courses 2022-06-09T00:00:00Z The collision reduces the atomic number by one, changing it from seven to six, changing the nitrogen into carbon with the same mass number of 14. An Introduction to Geology 2017-01-01T00:00:00Z What is the meaning of a mass number shown in parentheses? Anatomy and Physiology 2013-06-19T00:00:00Z The atomic number for the element fluorine is 9 and its mass number is 19. Environmental Biology 2018-09-06T00:00:00Z Emission of an electron does not change the mass number of the nuclide but does increase the number of its protons and decrease the number of its neutrons. Chemistry 2019-02-14T00:00:00Z Since an element’s isotopes will have slightly different mass numbers, scientists also determine the atomic mass, which is the calculated mean of the mass number for its naturally occurring isotopes. Biology for AP Courses 2022-06-09T00:00:00Z The differing number of neutrons affects the mass of an element in nature and the atomic mass number represents this average. An Introduction to Geology 2017-01-01T00:00:00Z The periodic table is a useful device because for each element, it identifies the chemical symbol, the atomic number, and the mass number, while organizing elements according to their propensity to react with other elements. Anatomy and Physiology 2013-06-19T00:00:00Z “I remember being fixated on the fat mass number and thinking I better be leaner to be a better runner,” Bullat said. Here’s why focusing on weight for athletic performance is not a winning strategy 2021-11-15T05:00:00Z These isotope symbols are read as “element, mass number” and can be symbolized consistent with this reading. Chemistry 2019-02-14T00:00:00Z The mass number and atomic number of carbon-13 is 13 and 12 , while that of carbon-12 is 12 and 6 , respectively. Biology for AP Courses 2022-06-09T00:00:00Z Protons and neutrons each have a mass number of 1. An Introduction to Geology 2017-01-01T00:00:00Z An element’s mass number is the sum of the number of protons and neutrons in its nucleus. Anatomy and Physiology 2013-06-19T00:00:00Z “It’s going to be the deployment of a mass number of people aimed at using direct action to shutting down the parade.” D.C. prepares for a million inauguration visitors — and protesters 2016-12-01T05:00:00Z State the numbers of protons, neutrons, and electrons in your atom, as well as the net charge and mass number. Chemistry 2019-02-14T00:00:00Z The mass number and atomic number of carbon-13 is 13 and 13 , while that of carbon-12 is 12 and 6 , respectively. Biology for AP Courses 2022-06-09T00:00:00Z The atomic mass is the number of protons and neutrons in the nucleus, each with a mass number of one. An Introduction to Geology 2017-01-01T00:00:00Z Protons and neutrons contribute nearly all of an atom’s mass; the number of protons and neutrons is an element’s mass number. Anatomy and Physiology 2013-06-19T00:00:00Z Given the mass number of people that saw their credit scores fall, and the special circumstances that surrounded it, is it time to reconsider our credit scoring system? It's Time To Revisit Our Credit Scoring System 2015-01-20T05:00:00Z Electron capture has the same effect on the nucleus as does positron emission: The atomic number is decreased by one and the mass number does not change. Chemistry 2019-02-14T00:00:00Z The mass number and atomic number of carbon-13 is 13 and 12 , while that of carbon-12 is 12 and 12 , respectively. Biology for AP Courses 2022-06-09T00:00:00Z If you walk into Best Buy, it's rather overwhelming to look at the mass number available. How to Extend Your Laptop's Life 2011-02-23T07:55:00Z |
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