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 ...
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}H H(ii) Use the dat a in the table to explain the term isotopes.(2)(b)The relative atomic mass of hydrogen in the ...
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...
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...
These energies gradually formed quarks, and the quarks moving at high speed collided violently, and protons, neutrons and electrons appeared one after another. ... This is really a wonderful world. More than 90 elements make up everything in the world, and we are constantly adding new members...
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
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
Describe the structure of an atom.An atom consists of a nucleus, which contains protons and neutrons, surrounded by electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. The number of protons determines
You are given an element 7X14.Find out.a.1.number of protons,electronsneutrons in Xa.2.valency of Xa.3.electronic configuration of X.b.If Bromine atom is available in the form of, say two isotopes35BR79 (49.7
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 ...