How many protons (and electrons) are in an atom of lithium? 答案是3吗? 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 你答的是SAT的题吧?问题1:写出氧的符号.尝试不要看元素周期表.答:O问题2:锂元素中有多少质子和电子?它问的有点问题,应该是or,因为原子中质子数=电子数如果原题是and,那么
The atom is the smallest representative unit of a single chemical element and it contains some numbers of protons, neutrons and electrons. The number of protons for an element is fixed and represented by its atomic number. The number of neutrons can vary, which is the basis for isotope...
How many valence electrons are in a neutral atom of argon? Neutral Atoms: A neutral atom is one that has an equal number of protons and electrons. The positive charge of the protons and the negative charge of the electrons will cancel each other out. In the case of argon, it has 1...
The sulfuric acid removes the alcohol from the air into a liquid solution. The alcohol reacts with potassium dichromate to produce: chromium sulfate potassium sulfate acetic acid water The silver nitrate is a catalyst, a substance that makes a reaction go faster without participating in it. The ...
Each of its atoms has a nucleus with 92 protons and 143 neutrons. Fire a neutron at uranium-235 and you turn it into uranium-236: an unstable version of the same atom (a radioactive isotope of uranium) with 92 protons and 144 neutrons (remember that you fired an extra one in). ...
Aurora KP index: A KP value of 7 or higher is often needed to see them in lower latitudes. Local conditions: Clear, dark skies are a must. Real-time social media reports: Many aurora chasers post live updates on platforms like X (formerly Twitter). ...
An atom that has an equal number of protons and electrons is neither positive nor negative -- it has no net charge. If that atom gains or loses electrons, however, it may become a cation, an ion with a positive charge, or an anion, an ion with a negative
aluminum is a pure chemical substance that can't be broken down into something simpler. All elements are arranged in the periodic table by theiratomic number-- the number of protons in their nucleus. Aluminum's lucky number is 13, so an aluminum atom has 13 protons. It also has 13 electr...
OK, so when a cell is in the RMP stage, sodium and potassium ions are both present on either side of the membrane. Cool beans. But — how do they cross the barrier? How does an ion enter or exit a cell? Well, that’s where ion channels come in. As the name implies, these ar...
Atomic number:The number of protons in an atom's nucleus is referred to as the atomic number of that element. The number of protons defines what element it is and determines its chemical behavior. For example,carbon atomsalways have six protons;hydrogen atomsalways have one; andoxygen atomsalw...