are due to the oxygen part - but those properties are generally less strong / intense than those of pure oxygen because of the presence of the other constituents of the mixture called 'air', e.g. many substances, such as wood, burn in air and burn even more vigourously in pure oxygen...
Magma contains various elements and compounds, 岩浆里含有各种各样的 元素和化合物, many of which are dissolved in the molten rock. 其中许多都溶解在熔融的岩石中。 At high enough concentrations, compounds like water or sulfur no longer dissolve, 达到足够高的浓度之后, 水或硫这类化合物将不再溶解,...
What are the elements called that are found in an A group (groups 1, 2, and 13-18) on the periodic table (also called representative elements)?Elements:Pure substances include elements and compounds. Elements are pure substances tha...
What is the term for a compound made from only two elements? What type of compound is not likely to dissolve in water? What acid and alkali make sodium chloride? What is the compound name of Pb(NO3)2? What are ionic compounds called?
If you rearrange your list into a table so similar atoms fall underneath one another, you get a diagram like this, which is called the Periodic Table. The columns are called groups and the rows are called periods. Artwork: The Periodic Table of the elements. So what? Atoms in a certain...
Which of these are compounds, and which are molecules? Explain. Answers: Salt (NaCl) contains two different elements, sodium and chloride, so it is a compound. Molecular hydrogen (H2) contains two atoms of the same element of hydrogen. Since H2 contains two or more elements, but the ...
While not nearly as prevalent as carbon, hydrogen and oxygen, nitrogen shows up in an extremely important type of organic molecule called a nucleic acid. The two types of nucleic acids found in cells are DNA and RNA, which make up the genetic blueprint of the cell and contain all the cod...
which can flow in one of two ways: as negatively chargedelectronsor as positively charged electron deficiencies called holes. In some semiconductors, the current consists mostly of electrons; in other semiconductors, it consists mostly of holes. Both the electron and the hole are called charge carr...
21.Welders’goggles contain and becausethese elements absorb high energy radiation.22.Because some of its compounds emit red light when excited by electrons,is often used in TV screens.23.The are radioactive.24.Elements with atomic numbers above 92 are called .25.Some smoke detectors used in ...
What sort of elements are involved in metallic bonding? What are ionic compounds called? Who classified metals and nonmetals? How are non-metal compounds formed? What are the chemical properties of tin? What are some native element minerals?