Thus, the number of protons in an atom identifies it as an atom of a particular element. The number of protons in an atom is referred to as the atomic number. 因此,原子中的质子数决定了原子的种类。原子中的质子数等于其原子序数(元素序数)。 The information provided by the periodic table for...
Determining the charge of an atom is easy in most cases but not all. Atoms are held together by the electromagnetic forces between the protons in the nucleus and the electrons surrounding it, and this means that most of the time there isn't actually much to work out. But when elements lo...
atomic orbital an orbital associated with an atom; the three-dimensional area around its nucleus where electrons are most likely to be found. atomic mass the average mass of the atoms in the naturally occurring element. aufbau principle the principle that states that an electron will always go ...
Related Articles: atom , atomic model , atomic theory , chemical element , John Dalton , physical science , subatomic particle , chemical bonding Transcript NARRATOR: Theorists have sought to determine what makes up matter since the age of the Greeks. At the beginning of the 19th century, the...
How do I represent owing $50 as an integer? How do I change fractions to percents? Can the inverse operation of f(x)= \frac{2x+3}{5x-2} be f^{-1}(x)= \frac{-2x-3}{-5x+2} ? How do you convert an improper fraction back into a proper fraction? How do you convert a num...
Not bad for an element that went undiscovered for such a long time. In this article, we'll take a closer look at aluminum -- its properties, occurrence and behavior. We'll also examine the life cycle of aluminum, from its production using the Hall-Heroult process to its ...
Structure Of An Atom: The elements present in the periodic table have a specific electronic configuration. There are certain elements that are highly stable and do not react with any other element. While there are a lot of elements that tend to get stabilized. It depends upon the electronic ...
an excellent Java simulation of this important experiment!); the nucleus comprised most of the mass of the atom. Later, when Rutherford bombarded nitrogen with alpha particles, a positively charged particle that was lighter than the alpha particle was emitted. He called these particlesprotonsand ...
There is a horizontal tube -- the same one the patient enters -- running through the magnet from front to back. This tube is known as the bore. But this isn't just any magnet -- we're dealing with an incredibly strong system here, one capable of producing a large, stable magnetic ...
Artwork: Isotopes are atoms of an element that contain the same number of protons and electrons but different numbers of neutrons. An unstable (radioactive) isotope will naturally try to make itself more stable by getting rid of some of these particles and changing into a different atom....