Oxidation State and Numbers of K2Cr(O4) (Potassium Chromate) To calculate the oxidation numbers for K2Cr(O4), count the number of atoms, draw the lewis structure by adding bonds, assign electrons from each bond,
Potassium atoms have 19 electrons and 19 protons with one valence electron in the outer shell. Potassium is considered chemically similar to sodium, the alkali metal above it on the periodic table. Under standard conditions potassium is a soft silvery-white metal. What is the mass number of thi...
Name an element in the fourth period (row) of the periodic table with four 4p electrons. Name an element in the third period of the periodic table with four 3p electrons. Name an element in the third period of the periodic table with six 3p electr...
The symbol Z is given to that atomic number, which is also the number of electrons in the atom and determines its chemical properties. Computer Exercise 2.A describes the program ELEMENTS, which helps find atomic numbers, symbols, and names of elements in the periodic table. Generally, the ...
The oxidation number of an atom simply shows the number of electrons it can account for in a redox reaction, or the degree to which it has undergone oxidation. A redox reaction, one of the most fundamental and commonly seen principles of chemistry, is a reaction where electrons are ...
What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons? What is the electron configuration of an element with atomic number 15? What value is closest to the mass of the atom? What is the mass number of an atom of potassium that has 20 neutrons?
Plutonium is not magnetic. Other members of the element group stick to magnets, but plutonium can have a variable number of electrons in its valence shell, which makes it difficult for the unpaired electrons to align in a magnetic field. ...
It shows the total number of electrons that have been removed from or added to an element to get to its present state. For example, in Fe2O3, the oxidation number of Fe is +3, and in FeO, it is +2. A loss of electrons corresponds to an increase in oxidation number. On the ...
An ion from a given element has 50 protons and 48 electrons. What is the charge on the ion? What is the name of the element? What is the symbol for the ion? A monatomic ion with a charge of -2 has an electronic conf...
In a theory of chemical bonding advanced by American chemist Gilbert N. Lewis and German chemist Walther Kossel in 1916, this octet of electrons was taken to be the most stable arrangement for the outermost shell of any atom. Although only the noble-gas atoms possessed this arrangement, it wa...