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 the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons? Why is atomic mass unit of an atom never an whole number? What is fermium's atomic mass number? How is the atomic mass of an element calculated?
A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it? What is the smallest particle of an element? If an atom with a mass number of 202 has 122 neutrons, it is an atom of which element?
Answer and Explanation: An atom that has more protons than electrons is called a cation. Ions are charged atoms or combinations of atoms. When an atom loses one or more... Learn more about this topic: Cation | Definition, Formation & Examples ...
There are two main types of sequences/progressions. Arithmetic Sequence - The difference between any two consecutive terms is the same for all... See full answer below. Learn more about this topic: Arithmetic Sequence | Defintion, Formula & Examples ...
go first into the L-shell, which can hold 8 electrons, then the M-shell which can hold 18 electrons, then the N-shell and O-shells that can fit 32 electrons each. (Actually, the O-shell could theoretically fit 50 electrons, but there is no known element with this many electrons.) ...
Silicon has total 14 electrons in its isolated atom. The first orbit consists of 2 electrons. The second orbit consists of 8 electrons and the third orbit consists of 4 electrons. As there are four electrons in the outer most orbit of a silicon atom, the silicon is a tetravalent element....
nucleus negative Hardly any Proton In nucleus positive 1 Neutron neutral An atom is the smallest particle of an element that has all of it’s characteristics of that element Atoms consist of even smaller parts Proton, neutron, and electrons A nucleus of an atom is made up of protons and ...
Valence electrons are those electrons that reside in the outermost shell surrounding an atomic nucleus. Valence electrons are of crucial importance because they lend deep insight into an element’s chemical properties: whether it is electronegative or electropositive in nature, or they indicate the...
Which element has atomic number 2? Which element has an atomic number of 8? Which element has atomic number 20? What is einsteinium? What element is a metal with 4 electrons in its outer shell? What is the atomic number of the element lawrencium?