Explanation:
Metals are the species which readily lose electrons in order to attain stability. This electron lost by the atom is actually present in its outermost shell which is also known as valence shell.
Ionization energy is defined as the energy required to remove the most loosely bound electron from a neutral gaseous atom.
When we move across a period from left to right then there occurs a decrease in atomic size of the atoms. Therefore, ionization energy increases along a period.
But when we move down a group then there occurs an increase in atomic size of the atoms due to addition of number of electrons in the atoms. Hence, ionization energy decreases along a group.
Thus, we can conclude that metals have low ionization energies and readily share their valence or outer electrons with each other to form an electron sea. These electrons are delocalized or shared among all the atoms that are bonded together and can therefore move freely throughout the metal structure.
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Answer:
7 mL
Explanation:
To prepare a solution by dilution of another one, we can use the equation:
C1V1 = C2V2
where <em>C</em> is the concentration, <em>V</em> is the volume, <em>1</em> is the initial solution, and <em>2</em> the final solution. V represents the total volume. K₂CrO₄ dissolver by:
K₂CrO₄ → 2K⁺ + CrO₄⁻²
So, 1 mol of K₂CrO₄ results in 1 mol of CrO₄⁻², the in a solution of 8.75x10⁻⁴M of CrO₄⁻², it will be 8.75x10⁻⁴M of K₂CrO₄, so the volume of the stock solution will be:
1.25x10⁻³xV1 = 8.75x10⁻⁴x10
V1 = (8.75x10⁻³)/(1.25x10⁻³)
V1 = 7 mL
This would be the downward movement of water. It begins flowing and continues in a downward movement moving throughout,
I believe it is A because a physical change is something that can be changed back to where a chemical change can not be such as burning something.