Answer and Explanation:1 The total mass of the nucleus is the sum of the mass of protons and neutrons. For a neutral element, number of protons are equal to the number of... Learn more about this topic: Atomic Nucleus | Definition & Structure ...
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What is the atomic number, number of protons, number of neutrons, and nuclear symbol for Be?Atomic Structure:An atom is made up of three subatomic particles: protons, neutrons, and electrons. Inside the nucleus of an atom, the positively charged protons and the neutrall...
The mass of an individual proton is 1.672621636(83)í–10 (-27) kg. The collective mass of the protons in the nucleus of an atom is roughly the same as the mass of all the neutrons. Of all the weight of an atom, more than 99 percent of the mass is contained in the nucleus; ther...
Protons and Neutrons: What Are They?Jean Louis Van Belle
The atomic mass is the mass of an atom. Although the SI unit of mass is the kilogram, the atomic mass is often expressed in the non SI-unit dalton, where one dalton is defined 1/12 of the mass of a single carbon-12 atom, at rest. The protons a...
The mass number of an atom is the total number of protons and neutrons contained within the nucleus of the atom. The number of protons determines the element and will always equal the atomic number of that element. The number of neutrons can change and will determine which isotope of that ...
百度试题 结果1 题目6 An atom of element Q contains 19 electrons, 19 protons and 20 neutrons.What is Q? B A calcium B potassium C strontium D yttrium 相关知识点: 试题来源: 解析 B 反馈 收藏
In emission of an electron, a neutron is converted into a proton. Therefore, number of neutrons decreases and the number of protons increases. The neutron to proton ratio decreases. In the emission of a positron, a proton is converted into a neutron. Hence the ratio increases. Show More ...
Neutrons, along with protons, are subatomic particles found inside thenucleus of every atom. The only exception is hydrogen, where the nucleus contains only a single proton. Neutrons have a neutral electric charge (neither negative nor positive) and have slightly more mass than positively charged ...