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
What is the element astatine used for? Which chemical element has the symbol Pt? What is meitnerium's periodic symbol? Which chemical element has the symbol Pb? Which chemical element has the symbol B? What element is lawrencium? How many protons does cesium have?
Protons and Neutrons: What Are They?Jean Louis Van Belle
Which atom has the smallest number of neutrons? What is an atom that has more protons than electrons? Which particle of an atom has the least mass? Which element has the highest atomic number? A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is ...
Elements in the same group have the same number of what? A. Protons B. Neutrons C. Electrons D. Valence E. lectrons 相关知识点: 试题来源: 解析 D。原因:“Elements in the same group have the same number of valence electrons.”。 反馈 收藏 ...
Atoms are the purest form of matter. They consist of protons, neutrons, and electrons. The periodic table lists all of the different types of atoms that are known to exist and are known as elements. Answer and Explanation: An atom that has more protons than electrons is called a cation. ...
ICSEC - Grade 09 - CHEMISTRY - Atomic Structure And Chemical Bonding - Q23
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] ...
Neutrons are similar in size to protons, with an amu of 1.00867, and also inhabit the nucleus of atoms. The number of neutrons in an atom in an element's most stable configuration is usually greater than the number of protons, with this disparity becoming larger as atomic number increases....
An atom is built with a combination of three distinct particles: electrons, protons, and neutrons. Each atom has a center nucleus, where the protons and neutrons are densely packed together. Surrounding the nucleus are a group of orbiting electrons. ...