Webb — performing operations; transporting; b23 — machine tools; metal-working not otherwise provided for; b23q — details, components, or accessories for machine tools, e.g. arrangements for copying or controlling; machine tools in general characterised by the construction of particular details or components; combinations or associations of metal … WebA compound is a substance that contains two or more elements chemically combined in a fixed proportion. The elements carbon and hydrogen combine to form many different compounds. One of the simplest is called methane, in which there are always four times as many hydrogen atoms as carbon atoms.

Molecule - Wikipedia

WebQ. Humans absorb oxygen from the air they breathe in and exhale carbon dioxide gas, CO2. Carbon dioxide gas is. answer choices. an element made of carbon and oxygen atoms. a solution made of carbon and oxygen atoms. a compound of carbon and oxygen atoms. a mixture of carbon and oxygen atoms. Question 19. WebJan 25, 2024 · A compound is a pure substance that is composed of atoms of two or more elements, bonded chemically with one another in a definite proportion. Hence, it can be … hartford co-op hartford alabama

Bilogy Unit 2 Flashcards Quizlet

WebThe four elements common to all living organisms are oxygen (O), carbon (C), hydrogen (H), and nitrogen (N), which together make up about 96% of the human body. In the … WebAnother way that atoms can combine is by something called 'fusion.'. This is when the nucleus of one atom and the nucleus of another atom actually come together, making one bigger atom with all of the electrons going around it. This is much less common and very hard for scientists to do. Weban independent structure of two or more atoms bound together compound consists of two or more different elements that are bonded chemically a substance composed of two or … hartford convention center testing