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
A certain element has its outermost electron in a 2s subshell. It has valence +1 because it has 1 more electrons than a certain noble gas. What element is it? Express your answer using its one- or twoWhat name is given to the elements with atomic numbers greater than 92?What does the...
What chemical element is Cu? Which chemical element has the symbol B? Which chemical element has the symbol Pt? What chemical element has 4 protons? What element has 10 electrons? What element has 13 electrons? Which chemical element has the symbol Sn?
Consider the element Au (Atomic Mass = 197). How many protons, neutrons, and electrons does a neutral atom have? An element has an atomic number of 114 and an atomic mass of 285. How many protons, neutrons, and electrons does a neutral atom of this element have?
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 from Chapter 28/ Lesson 39 ...
MERLIN Multi-Element Radio-Linked Interferometer Network MUSE Multi-Unit Spectroscopic Explorer NFM Narrow Field Mode NIRSpec Near-Infrared Spectrograph NLR Narrow Line Region PSF Point Spread Function RGS Reflection Grating Spectrometer RL Radio Loud RQ Radio Quiet SDSS Sloan Digitized Sky Survey SMBH ...
Some elemental types of atoms are better than others at releasing their electrons. To get the best possible electron flow we want to use atoms which don't hold very tightly to their valence electrons. An element's conductivity measures how tightly bound an electron is to an atom. ...
The same element can also vary in the number of electrons it has, creating ions. For example, sodium (Na) is a highly reactive element. Na can form an ionic bond with chlorine (Cl) where the sodium loses an electron -- becoming Na+ -- and gives it to the chlorine atom -- which ...
Ligases form a bond by removing the water element, while hydrolases break bonds by adding water. There are various subclasses of ligases that include ATP synthesis. Cofactors in Enzymes Cofactors are non-protein compounds associated with enzymes. A cofactor is needed for the proper functioning of ...
IUPAC defines transition elements as an element having a d subshell that is partially filled with electrons, or an element that has the ability to form stable cations with an incompletely filled d orbital.Hence, the correct option is (B) Metals.Note:The metals ...