This apparent contradiction between the chlorine ion and the sodium ion is; due to electrostatic attraction between the nucleus and the electrons.
As we know, there's a periodic trend for atomic radii in the periodic table; the trend is as follows;
- <em>Atomic radius increases down a group and reduces across the period.</em>
Elements get larger down the group and this explains the trend down a group.
- However, atomic radius decreases across a period because the more Valence electrons there are in an element, the more the electrostatic attraction between the positively charged nucleus and the negatively charged electrons.
Consequently, when Chlorine forms an ion by gaining an electron, the electrostatic attraction between its nucleus and electrons increases and the the atomic radius decreases.
On the other hand, when sodium forms an ion by losing an electron, the electrostatic attraction between its nucleus and electrons decreases and the the atomic radius increases.
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Give them bigger shelters
Find a way to help them get back on their feet
Set up more walk-ins for hot meals
Donate supplies to them; their needs that can be given
Answer:
Percent error = the absolute value of (actual value - expected value) / (expected value)
Percent error = (2.7-2.78)/(2.78)
Percent error = 0.029
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Explanation:The sequence of the bases?, A, C, G and T, in DNA determines our unique genetic code and provides the instructions for producing molecules in the body. The cell reads the DNA code in groups of three bases.
A wrecker is considered to be an emergency vehicle when it's emergency lights are flashing. Under normal circumstances, a wrecker's lights are not flashing when it is just a truck or a service vehicle.
