(a)(i)Accept for the relative mass of electron[1] All relative charges are correct[1] All relative masses are correct(ii) The mass of an atom is concentrated in the nucleus of an atom. The electrons are of negligible mass.The nucleus is positively charged(due to the protons), and the...
Atoms:Atoms consist of tiny particles called protons, neutrons and electrons. Proton and neutrons are present in the nucleus and the electron resides around the nucleus. The protons number will be same as the electrons count in the atom. ...
APPENDIX - Electrons, Neutrons and Protons in EngineeringELSEVIERElectrons Neutrons & Protons in Engineering
极性-2-Polar Covalent Bonds and Nonpolar Covalent bonds极性共价键和非极性共价键 1159 -- 12:16 App 分子间作用力-1-Dipole Dipole Forces of Attraction - 偶极偶极 781 -- 11:42 App 原子理论-3-Law of Multiple Proportions 倍比定律及练习 57 -- 6:26 App 化学计量学-8- Percent Error 误差的计...
解析 就是单数复数啦... 比如说proton就是一个质子,protons就是多个质子……氢就是one proton…… 在这几个词中,nucleus比较特殊.nucleus是单数,nuclei是复数【参见半径单数=radius复数=radii】 分析总结。 比如说proton就是一个质子protons就是多个质子
5 Which statements comparing the properties of electrons, neutrons and protons are correct?neutrons and protons are only electrons and both heavier than electrons neutrons are charged A ✓ ✓ B ✓ × C x ✓ D x 相关知识点: 试题来源: 解析 B ...
Answer to: State the number of protons, neutrons, and electrons for an ion of calcium-40 which has a charge of +2. By signing up, you'll get...
An element's atomic number is defined by the number of protons it has. When an atom has a neutral charge, the number of protons is equal to the number of electrons. However, when it is charged, the number of lost or gained electrons is equa...
Atomic Structure Protons, Neutrons, and Electrons Section 4.3 Distinguishing Among Atoms Just as apples come in different varieties, a chemical element can come in different “varieties” called isotopes. 4.3 Protons Protons- determine the identity of an atom –Elements are different because they each...
Often, the number of protons and electrons is not the same, so the atom carries a net positive or negative charge. You can determine the number of electrons in anionif you know its charge. A cation carries a positive charge and has more protons than electrons. An anion carries a negative...