Elements and Compounds Vocabulary List & Definitions density The state if compactness of a material. electron A small particle that carries one unit of negative energy. element A specific component that comprises something. mixture A combination of two or more substances mixed together. molecule Two ...
Some texts use the terms semimetals and metalloids interchangeably, but more recently, the preferred term for the element group is "metalloids," so that "semimetals" may be applied to chemical compounds as well as elements that exhibit properties of both metals and nonmetals. An example of a s...
Atom (原子): The basic unit of a chemical element.Nucleus (原子核): The central part of an atom containing protons and neutrons.Proton (质子): A subatomic particle with a positive charge.Neutron (中子): A subatomic particle with no charge.Electron (电子): A subatomic particle with a ...
With the exception of lutetium, all of the lanthanide elements are f-block elements, referring to the filling of the 4f electron shell. Although lutetium is a d-block element, it's usually considered a lanthanide because it shares so many chemical properties with the other elements in the gro...
All the elements that form diatomic bonds are non-metals, meaning they are found on the right side of the periodic table. Again, there is an exception to the rule. Since hydrogen is the first element and sometimes acts like the alkali metals, it is found in the left uppermost corner of...
That is, all living material includes carbon, and carbon creates the building blocks of life. Organic compounds include carbon as the main element. There are four main types of organic compounds in human function: carbohydrates, lipids, proteins, and nucleic acids. These organic compounds help ...
Here, the composition of trace elements controlled manually provides different separation modes of nucleic acid polyvinyl chloride, which constitutes a reference trace element; and provides a unique position separation as part of a complementary sequence of nucleic acid polyvinyl chloride; in addition, ...
plant constituting around 40% of the plant’s active compounds.CBD does not have the same psychotomimetic (mind-altering) effects as the main plant compound THC (Δ9-tetrahydrocannabinol). In fact, CBD is able to counter the mind-altering effects caused by THC.CBD...
either molecular or ionic compounds. Then we will learn the rules of nomenclature that ensure that a compound is named according to IUPAC rules. We will end this unit by looking at quantitative relationships for compounds including the molar mass of and mass percent of an element in a compound...
This dangerous and harmful activity of spraying sulfur compounds into the air ("geoengineering") was attempted to be legitimized by global warming fear mongers like Al Gore, at a huge profit of course.The appearance of this chemtrail type has decreased since 2011. I believe it's because so...