Answer:
Explanation:
In a chemical formula, the oxidation state of transition metals can be determined by establishing the relationships between the electrons gained and that which is lost by an atom.
We know that for compounds to be formed, atoms would either lose, gain or share electrons between one another.
The oxidation state is usually expressed using the oxidation number and it is a formal charge assigned to an atom which is present in a molecule or ion.
To ascertain the oxidation state, we have to comply with some rules:
- The algebraic sum of all oxidation numbers of an atom in a neutral compound is zero.
- The algebraic sum of all the oxidation numbers of all atoms in an ion containing more than one kind of atom is equal to the charge on the ion.
For example, let us find the oxidation state of Cr in Cr₂O₇²⁻
This would be: 2x + 7(-2) = -2
x = +6
We see that the oxidation number of Cr, a transition metal in the given ion is +6.
Answer:
false
Explanation:
It is called the periodic table because of the way the elements are arranged. You'll notice they're in rows and columns. The horizontal rows (which go from left to right) are called 'periods' and the vertical columns (going from up to down) are called 'groups'.
Answer:
<em>Freezing</em><em> </em><em>water</em><em> </em><em>and</em><em> </em><em> </em><em>cracking </em><em>limestone</em><em> </em><em>are</em><em> </em><em> </em><em>physical</em><em> </em><em>change</em><em>s</em><em>.</em>
Explanation:
why according to the source,did the American government pass the fordney_McCumber Act?
A. The number of valence electrons determines how it reacts with other elements.
<em>One to three valence electrons</em>: The element behaves like a metal and reacts with non-metals.
<em>Five to seven valence electrons</em>: The element behaves like a non-metal and reacts with metals.
<em>Four valence electrons</em>: Elements at the top of the Group are non-metals, while those at the bottom are metals.
<em>Eight valence electrons</em>: Elements have a complete octet, so they are generally unreactive.
