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 sulfur's atomic radius? What is the electron configuration for calcium? What is the atomic radius of zinc? What element has a small atomic radius? How many neutrons are in calcium? What is the atomic radius of francium? What is the atomic mass of calcium carbonate?
The scientific study of matter's characteristics and behaviour is known as chemistry.andare different from the normal vocabulary. It is a branch of natural science that examines the building blocks of matter, including the atoms, molecules, and ions that make up compounds and their composition, s...
What is the formula for calcium fluoride? Where does the subscript 3 after the fluorine come from when writing the equation: Al + 3F2 --> 2AlF3? How many protons does fluorine have? What is the orbital diagram for fluorine? Where is fluorine found?
What is the electron configuration of calcium, which has 20 electrons? What is the electron configuration of dubnium? What is the electron configuration for vanadium? Write the noble-gas notation for the electron configuration of Cl. What is the unabbreviated electron configuration of neptunium?
What Is the Steady State Theory of the Universe? What Is a Pair-Instability Supernova or a PISN? What Is an Electron-Capture Supernova? What Is Stellar Nucleosynthesis via Nuclear Fusion?
Nucleosynthesis is the creation of new atomic nuclei, the centers of atoms that are made up of protons and neutrons. Nucleosynthesis first occurred within a few minutes of theBig Bang. At that time, a quark-gluonplasma, a soup of particles known asquarks and gluons, condensed into protons an...
What is the orbital diagram for silicon? Is silicon a semiconductor? How many atoms thick is graphene? How many valence electrons does silicon have? What is the density of paraffin? How many protons, neutrons, and electrons does silicon have?
electrons carries a net positive charge and is called a cation. An ion with more electrons than protons carries a net negative charge and is called an anion. The number of neutrons doesn't come into play since they are electrically neutral. Changing the number of neutrons determines the ...
Ca - Calcium Element Symbols and Numbers The number of the element is its atomic number, which is the number of protons in each atom of that element. The element symbol is a one- or two-letter abbreviation of the element's name. Sometimes it refers to an old name. (For instance, K ...