百度试题 结果1 题目11 Which of the following element has an isotope that does not contain neutrons?C A neon B. helium C hydrogen D nitrogen 相关知识点: 试题来源: 解析 C 反馈 收藏
What element has 53 protons and 74 neutrons? A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it? If an element has 80 protons and 200.56 mass number, then the number of neutrons will be ___. Which element has 1...
10 An isotope of element Y has 19 protons and 20 neutrons in its nucleus. Which is the symbol for the ion of Y?B A. ½{20}{0}x B ½{30}{3}Y* C $$ \begin{matrix} 2 0 \\ 1 9 \end{matrix} $$Y D. $$ _ { 1 9 } ^ { 3 9 } $$Y 相关知识点: 试题来源: ...
An element that has the electron configuration (Ne)3s2 is in the group: a. 2. b. 5. Identify the shell, subshell, and number of electrons for the following: (a) 2p^3. (b) 4d^9. (c) 3s^1. (d) 5g^{16}. An ion has 18 protons, 19 neutrons, and 19 electro...
To solve the problem of identifying the element that has a K-alpha X-ray line of wavelength 1.8 Å, we will use the formula derived from Moseley's law. Let's go through the solution step by step.Step 1: Understanding the K-alpha X-ray
Which has the largest relative mass? The nucleus of an atom is composed of uncharged particles as well as which of the following? A. Protons B. Neutrons C. Electrons D. Positrons The smallest particle of an element that retains the characteristics of the elem...
element symbol : Z A X, where, A (mass number) = no .of protons + no .of neutrons . Z (atomic number) = no . of protons . (electrons = protons) . Nuclear stability: The nucleus is composed of protons and neutrons. The strongest nuclear force b...
a有 但是 是坏的 But has is bad[translate] a也就是说铁元素原子核中的中子与质子要比其它所有元素原子核中的中子与质子靠近得更紧密,其中子与质子间的强相互作用力也最大,因而当其向同一个方向排列时,其也具有最大的磁场。 In other words, in the hard element atomic nucleus neutron and the proton ...
1. Isotopes are the atoms of the same element having same atomic number but different mass-numbers. 2. Isobars are the atoms of different elements having different atomic number but same mass-number. 3. Isotones are atoms of different elements having same number of neutrons. ...
It states the number of electrons an element shares in an atom. It is also defined as the charge of an ion. The oxidation number is used in REDOX reactions. In those reactions, we determine the oxidation state of each atom to predict if it is going to oxidize or to reduce.Answe...