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 mass number of an ion with 107 electrons, 159 neutrons, and a +1 charge? If element X has 52 protons, how many electrons does it have? If element X has 60 protons, how many electrons does it have? Identify the element, its atomic number, mass number, and electrical char...
Theneutron isslightlyheavierthan theproton. This increases the mass of nuclei with more neutrons than protons relative to the atomic mass unit scale based on12C with equal numbers of protons and neutrons. Thenuclear binding energyvaries between nuclei. A nucleus with greater binding energy has lower...
ICSEC - Grade 09 - CHEMISTRY - Atomic Structure And Chemical Bonding - Q23
When the stated mass number of an element is not a whole number that doesnotmean that there are parts of protons or neutrons present in the atom. It means that that mass number has been calculated to take into consideration theproportions of the different isotopes of that element believed to...
What is the atomic number of the element? A) 43 B) 50 C) 86 D) 93 E) 100 An element has 43 protons and 50 neutrons. What is the atomic number of the element? What two chemical elements (look at the copy of the periodic table of elements) are required for most presumptive blood...
An isotope of an element has the same number of protons but a different number of neutrons. thermofisher.com/xrf Did you know? The periodic table was created in 1869 by Dmitry I. Mendeleev. 7 List of periodic table elements 1 Hydrogen 2 Helium 3 Lithium 4 Beryllium 5 Boron 6 Carbon 7...
Astatine was madeby bombarding bismuth-209 with alpha particles in a cyclotron (particle accelerator) to produce, after emission of two neutrons, astatine-211. The scientists found that the isotope they created was radioactive, so they named the element using the Greek 'astatos' meaning unstable....
I like to request you that these questions can be summed up as matter (the lesser of space), space ( the lesser of matter) and combination of both as Zero point element (which is not like a particle in normal sense and also acts like virtual particles) and this can be answers t...
We know that neutrons can exist in neutron stars with an escape velocity of 2/3c so why not basic particles like electrons, quarks, etc which seem to have no smaller structure, form a ball inside a black hole and that spins at maximum speed? I like to think the Universe is somehow ...