百度试题 结果1 题目What are the numbers of protons,electrons,and neutrons in239Pu?相关知识点: 试题来源: 解析 Protons:94, from the periodic table. Electrons : 94, since the atom is uncharged. Neutrons:239-94=145 反馈 收藏
An atom that has more protons than electrons is called a cation. Ions are charged atoms or combinations of atoms. When an atom loses one or more...Become a member and unlock all Study Answers Try it risk-free for 30 days Try it risk-free Ask a question Our experts can answer your...
What is the main component of the atomic mass in English? A. Protons B. Electrons C. Neutrons D. Protons and neutrons 相关知识点: 试题来源: 解析 D。本题考查原子质量的主要组成部分。质子和中子的质量较大,是原子质量的主要构成部分,电子质量很小可忽略。选项 A 仅提到质子,不全面。选项 B 电子...
The atomic mass of an atom is approximately equal to the number of protons plus the number of electrons, since the mass of electrons is practically negligible. References Purdue University: Bodner Research Web: The Atom and Electromagnetic Radiation ...
Introduction to Protons & Electrons Majority of the electric charge is contained with the protons and electrons present within the atom. The negative charge is carried by electrons, whereas protons carry the positive charge. It is vital to know that, electrons and protons attract each other; the...
Protons have apositive(+1)charge, which balances the negative (-1) charge of theelectronsthat surround the nuclei of atoms. Protons have arelative massof 1, which is the same as the relative mass of neutrons. Thenumber of protons in an atomis called the 'Atomic Number' of that atom and...
a毫无疑问 ) he is qualified for the job. Without a doubt) he is qualified for the job. [translate] aAn atom containing 34 protons, 43 neutrons, and 34 electrons would have what symbol? 包含34个氢核、43个中子和34个电子的原子将有什么标志? [translate] ...
What is the charge of a proton? A proton carries a single positive electric charge, symbolized as +1e. 10 Are protons stable? Yes, protons are stable particles that do not readily annihilate. 9 How do positrons interact with electrons? Positrons and electrons annihilate upon contact, releasin...
is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus. In an uncharged atom, the atomic number is also equal to the numbe...
An atom is identified by the number of protons present in its nucleus which is called its atomic number. The mass number describes the total number of protons and neutrons. Using the number of protons, electrons and neutrons, we can identify and label the atomic or ionic species....