A molecule is a group of two or more atoms chemically bonded together. The atoms with in the molecules are held of force of attraction. It is smallest particle of an element or a compound that is capable of an free state and that has all the properties of that substance. ...
A compound is made up of two or more elements (like carbon monoxide - carbon and oxygen), and an element is only one, like neon. The Periodic Table is a method or tool for organizing the elements. The items in the Periodic Table are organized by the number of electrons in the shells...
The smallest unit of a chemical element is an atom , and all atoms of a particular element are identical.Parts of an AtomThere are two parts to an atom ( Figure below ):At the center of an atom is a nucleus made up of two types of particles called protons and neutrons. Protons ...
Atoms are the basic building blocks of matter representing a single element. Molecules form when two or more atoms combine through chemical bonds to create new substances with different properties. 2. Is oxygen an atom or molecule? Oxygen can exist as both. A single oxygen (O) is an atom, ...
Matters are made up of molecules, and molecules of atoms. (用高级短语替换are made up of)consist of2. Professor Smith, along with his assistants, are working on the project day and night to meet the demands.(改错)are改成is3. She is in a poor Dof health, which worries her mother very...
Covalent (chemical) bonds bind one or more atoms together to form molecules. In this article, we will learn more about atoms and molecules and how are they formed with some examples.What are Atoms?Atoms can be considered the basic unit of matter on a micro-level, creating a substance by ...
Most of the molecules that make up the mass of our flesh (including water) are molecules wherein the atoms are bound together by ___ bonds. Water molecules Water molecules are closely attracted to each other. The molecules are m...
Though both are built from more basic units that are, in turn, constructed from a small number of atoms, for these two materials classes the nature of these units is thought to be quite different. For covalent solids and liquids, these units are considered to be molecular, meaning that ...
(a) Describe the arrangement, separation and motion of gas molecules.arrangementseparationmotion 相关知识点: 试题来源: 解析 (a) 描述气体分子的排列、分离和运动。 ### 排列 气体分子的排列是非常松散的,它们之间的距离相对较大,没有固定的位置,可以自由地在容器中移动。气体分子之间的相互作用力较弱,不足...
The two most common gasses in the Earth's atmosphere, after nitrogen and oxygen, are argon and carbon dioxide. a. What are the chemical formulas for these gasses? b. What properties of these molecules (what they are made of or how the atom...