Which are the LARGEST atoms?
The
A fundamental trend observed for the Periodic Table, is that atomic size INCREASES DOWN a Group, a column of the Periodic Table, yet DECREASES ACROSS a Period, a row of the Periodic Table, from left to right as we face the table.
This fundamental trend is a consequence of Periodicity, and two atomic properties. In a given atom, incomplete electronic shells shield the nuclear charge VERY INEFFECTIVELY. The result, as we go across a Period, the element to the right is a SMALLER atom due to the increased (and poorly shielded) nuclear charge.
Once a valence shell is filled, shielding of the atomic charge is effective, and the next valence shell is commenced (with the alkali metals) at a larger radius, a large separation from the nuclear core.
Of course, the Table is constructed so as to reflect the fundamental electronic structure.
As a chemist, as a physical scientist, you should look at actual data to inform your argument. Here is start.
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The largest atoms are those with the highest atomic number, such as radium and francium.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
- How do you know the number of electrons in the outermost energy level of an atom?
- How do rationalize atomic size on the basis of an element's position on the Periodic Table?
- What nonmetals are gas at room temperature?
- How do nonmetals react with acids?
- Why did Mendeleev have problems arranging the elements #Te# and #I#?

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