How many valence electrons does a neutral atom of aluminum have? How many protons, neutrons, and electrons are in aluminum? How many neutrons does aluminum have? How many atoms are in 2 Fe? The compound Fe2O3 contains how many atoms?
The number of protons in an atom of any given element is always the same. Physicists call this the atomic number. So, in the above example of lead, its atomic number is 82 and that does not change; if it did, it would be a different element (thallium, atomic number 81, or bismuth...
How many atomic mass units are in one gram?Atomic Mass Units:Atomic mass units are the minute quantity of mass used to measure subatomic particles and determine the mass of a single atom or molecule. Only the protons and neutrons in the nucleus of an atom are measured in whole atomic mass...
except for a few particles spinning around, some electrons scattered here and there at random, and protons all more or less on their own. I started feeling a bit strange, as if there was going to be a change of weather (in fact, it had grown slightly cold), and so I said: ...
The table has seven rows and 18 columns. Each row represents one period; the period number of an element indicates how many of its energy levels house electrons.Sodium,for instance, sits in the third period, which means a sodium atom typically has electrons in the first three energy levels....
Elements are composed of only one type of atom. There are 118 elements known to scientists. Among these are: gold, silver, mercury, lead, bismuth, and antimony.Answer and Explanation: Up to 83 elements can be found in the human body. However, the vast majority of these only occur in ...
The beta decay is the decay of electron or positron from a radioactive nucleus. The atomic number of an atom is the number of protons present in the nucleus and the mass number is the total number of protons and neutrons present in the nucleus....
A mole is one of the seven SI base units, which describes the "amount of substance." Its values is derived from the isotope carbon-12, which is also used as a base for determining the unit of Dalton.Answer and Explanation: Avogadro's number relates the number...
a. an alpha particle b. a beta particle c. a neutron When the radium atom undergoes nuclear decay, how does the number of protons in the nucleus change? What changes occur to the atomic number and mass of a nucleus during this decay scenario: __a beta particle...
407K Learn about valence electrons and how to find the number of valence electrons on the periodic table. Discover the role of a valence electron in an atom. Related to this QuestionGive the electron configuration for potassium. How many valence electrons does it have? How ...