百度试题 结果1 题目10 An isotope of element Y has 19 protons and 20 neutrons in its nucleus. Which is the symbol for the ion of Y? B2039A YB19192039C YD1919 相关知识点: 试题来源: 解析 B 反馈 收藏
Which element has the same number of valence electrons as phosphorus? Which element will most likely gain electrons? a. Cl b. Na c. Ne Why? What is an atom that has more protons than electrons? What element has 10 electrons? What element has 13 electrons?
Tin is the 49th most abundant element on Earth and has, with 10 stable isotopes, the largest number of stable isotopes in the periodic table, thanks to its magic number of protons. It has two main allotropes: at room temperature, the stable allotrope is β-tin, a silvery-white, ...
secondary endodontic infection The Z element's impact on the materials' electronic and photocatalytic traits was definitively observed. Biaxial strain induces an indirect-direct band gap transition in WSiGeN4, accompanied by semiconductor-metal transitions in both WSiGeP4 and WSiGeAs4. Detailed ...
An element crystallizes in a body-centered cubic lattice. The edge of the unit cell is 286 pm, and the density is 7.92 cm3. What is the atomic mass of the element? Calculate the density of atoms in (001) in Lithium answer in...