It has no known components or substructure, and therefore is believed to be an elementary particle.这种题最好有图解说比较好2.What is an element, mixture, molecule, and compound?什么是元素,混合物,分子和化合物A chemical element is a pure chemical substance consisting of one type of atom.In ...
What is a Mixture... in terms of Chemistry ? Matter can be classified in various ways according to its structure, behaviours andphysicaland chemical properties. The main classifications of matter include the categorieselementandcompound, either of which may also be called asubstance(which is a le...
element vs. compound Anelementis a substance that cannot be separated into simpler substances by chemical means. An element consists of anatomwith a unique combination ofprotons,neutrons, andelectrons. For example, the element hydrogen has one proton, one neutron, and one electron. We cannot use ...
结果1 题目 7 What is an alloy? C A a compound of two metallic elements B a compound of metallic and non-metallic elements C a mixture of a metal and at least one other element D a pure metal element 相关知识点: 试题来源: 解析 C 反馈 收藏 ...
oxide (Li2O). Sometimes, a new compound might form when an element is exposed to an existing compound. For example, when pure elemental sodium (Na) is submerged into liquid water (H2O), a reaction occurs, resulting in the formation of sodium hydroxide (NaOH) and the release of hydrogen ...
A molecule is a group of two or more atoms joined by chemical bonds, whereas a compound is a substance formed by the chemical bonding of more than one type of element that exists in a fixed proportion.
s definition only tells youwhenyou have an element, and not what an element is and what distinguishes one from another. And it is highly provisional, hostage to your analytical capabilities. How could you be sure that you had an element and not just a compound that no one had yet found ...
Superconductor is an element, inter-metallic alloy, or a compound that conducts electricity without resistance below a certain temperature.Once set in motion, electrical current will flow forever in a closed loop of a superconducting material.
which is anything that has mass and occupies space, is classified based on its physical and chemical properties. Matter can be classified into two major classifications, namely: pure substances, and mixtures. A pure substance could either be an element or a compound, whereas a mixture could eit...
Here's how to remember the difference. If you join two different chemical elements together, you can often make a completely new substance. Glue two atoms of hydrogen to an atom of oxygen and you'll make a single molecule of water. Water is a compound (because it's two different ...