Element is a substance that cannot be decomposed into simpler substances. In an element, all the atoms have the same number of protons or electrons, although the number of neutrons my vary. Citing this page: Generalic, Eni. "Element."Croatian-English Chemistry Dictionary & Glossary. 29 June ...
2 This question is about hydrogen, the element with atomic number Z =1.(a)(i) Hydrogen has two stable isotopes, H and H. Complete the table to show the number of subatomic particles present in the nuclei of these two isotopes of hydrogen.(1)Isotope Number of protons Number of neutrons...
An element is a type of atom, and atoms typically have three components: positive protons, neutral neutrons, and negative electrons. What is the element definition in chemistry? An element is a substance made up of only one type of atom, all with the same number of protons. Gold offers a...
The only way to change one element into another is to use a nuclear reaction. Innuclear fission, a heavy element with many protons and neutrons is split into lighter elements. In nuclear reactors, the element uranium is split by collisions with free neutrons that release energy. Innuclear fusi...
Although all atoms of an element have the same number of protons in their nuclei, they may not all have the same number of neutrons. Atoms of an element with the same mass number make up an isotope of the element. All known elements have isotopes; some have more than others. Hydrogen,...
百度试题 结果1 题目10 An isotope of element Y has 19 protons and 20 neutrons in its nucleus. Which is the symbol for the ion of Y? B2039A YB19192039C YD1919 相关知识点: 试题来源: 解析 B 反馈 收藏
Plutonium atoms fall apart through a process calledalpha decay. They release particles made from two neutrons and two protons (essentially a helium nucleus). They're so bulky that they can't pass through human skin. Left to its own devices, plutonium decays slowly. The real danger comes when...
Atoms of elemental substances are themselves complex structures composed of more fundamental particles called protons, neutrons, and electrons. Experimental evidence indicates that, within an atom, a small nucleus, which generally contains both protons and neutrons, is surrounded by a swarm, or cloud,...
How many neutrons, protons, and electrons are in carbon? What does 'elements made up of atoms with the same number of protons' mean? What is an Atomic Mass Unit (AMU)? The common isotopes of carbon are 12C and 13C. The average mass of carbon...
Elements element - a substance composed of a single kind of atom that cannot be broken down into another substance by chemical means. Each element square represents 1 atom of that element Mass Atomic Number number of protons found in the nucleus of an atom ALSO number of electrons surrounding ...