grouping of elements becomes apparent. The electron configuration (the arrangement of electrons in an element) is a direct result of the work of Bohr, Heisenberg, Schroedinger, and other physicists in the early 20 th century. Elements are arranged in horizontal rows, called periods. Each period ...
The electron configuration of a certain element is 1s² 2s² 2p⁴. Which of the following is correct about this element? A. It is a metal. B. It is a non-metal. C. It is a noble gas. D. It is a transition metal. 相关知识点: 试题来源: 解析 B。解析:该元素价电子数为...
Electronic configuration is defined as the distribution of electrons into the orbitals of an atom. Every neutral atom consists of a fixed number of electrons which is equal to the number of protons and is called the atomic number. Apart from electrons and protons, an atom also has neutrons whi...
The last electron written for the electron configuration for an element in columns 13 - 18 is in the p-orbital, so that is the p-block. The bottom two rows that are not connected to the rest of the periodic table have electrons in the f-orbital, so they are the f-block. What is...
To check your complete electron configuration, look to see whether the location of the last electron added corresponds to the element’s position on the periodic table. Predicting the Order of Filling of the Orbitals There are three ways to predict the order of filling of the orbitals. Probably...
What is the outer electron configuration for the group 15 element in the fourth period?Outer Electron Configuration:The outer electron configuration of a group shows the arrangement of the valence electrons (outer electrons) amongst the valence shell of the atoms of elements of...
Chapter 7 Electron Configuration and the Periodic Table 1 Copyright McGraw-Hill 2009Copyright McGraw-Hill 2009 27.1 Development of the Periodic Table 1864 - John Newlands - Law of Octaves- every 8th element had similar properties when arranged by atomic masses (not true past Ca) 1869 - Dmitri ...
1 The electron configuration of element X is: 1s^{2}2s^{2}2p^{63s^{2}3p^{4}What is the formul a of a compound formed when sodium reacts with element X? A. NaX B $$ N a X _ { 2 } $$ C $$ N a _ { 2 } X $$x D$$ N a _ { 2 } X _ { 3 } $$Your an...
What element has three valence electrons in the 6p shell? What is the valence electron configuration for the element in Period 4, Group 6A? Which group in the periodic table contains elements with the valence electron configuration of ns^2np^1? Please ...
The electron configuration of the element 'M' is [Ar] 3d^(10) 4s^(2) 4p^(3). Then 'M' belong to