百度试题 结果1 题目The total number of protons and neutrons in an atom is calledA.the atomic numberB.the proton numberC.the mass numberD.the neutron number 相关知识点: 试题来源: 解析 C 反馈 收藏
.This is because the number of protons (the nuclear charge) and the number of electrons increases by one every time you go an element to the right. .The elements in a period all have the same number of shells (so the shielding effect is the same). .This means that as you go across...
Which of the following elements has the least number of protons? A. Hydrogen B. Helium C. Lithium D. Beryllium 相关知识点: 试题来源: 解析 A。解析:氢(Hydrogen)的原子序数为1,也就是质子数为1;氦(Helium)原子序数为2,质子数为2;锂(Lithium)原子序数为3,质子数为3;铍(Beryllium)原子序数为4,...
The number of protons in an atom equals the number of ___. The sum of an atom's protons and neutrons is its What nuclide has 27 protons and 33 neutrons? The atomic mass is equal to: A. the number of neutrons. B. the number of protons plus the number of electrons. C. the number...
The number of protons in an atom is referred to as the: a. mass number b. atomic mass c. atomic number d. charge Proton: Proton is a subatomic particle that lives inside the nucleus of an atom. It is positively charged and has a charge equal...
1The table lists the number of protons, neutrons and electrons in several different particles.particle number of number of number of(not chemical protons neutrons electrons symbols)C101D332E777898G8108H91010Which of the particles, C, D, E, F, G and H in the table, fit each of the ...
1. The number of protons plus the number of neutrons is the element's ___ 2. An atom or molecule that has lost or gained an electron is called a (n) ___ 3. A(n) ___ describes an atom that has lost one or more electrons is called a (n) ___ Classification ...
To understand the significance of the number of protons in the atoms of different elements, we can break it down into the following steps:1. Definition of Protons: Protons are positively charged particles found in the nucleus o
The periodic table is a chart that reflects the periodic recurrence of chemical and physical properties of the elements when the elements are arranged in order of increasing atomic number (the number of protons in the nucleus). It is a monumental scientific achievement, and its development illustra...
“物必先腐也，而后虫生之”，意味着事物的毁灭往往酿生于自身，物自败，尔后生机失，物不腐，虫何生？事物兴衰存亡，内因是决定性因素。由此推及人事，古代哲人尤其强调求仁在己，祸福在我。孟子曰：夫人必自侮，然后人侮之，家必自毁，然后人毁之；国必自伐，而后人伐之。《太甲》曰：天作孽，犹可违，自...