Question

we can read the periodic table by atomic number, atomic mass and chemical symbols directly.
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hs
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however, we can also read the properties of elements indirectly as well. some trends we can read include atomic radius, electronegativity, and ionization energy.
atomic radius: the size of the atom
we can measure the relative size of an element based on 2 main factors: the number of

• the number also tells your how many energy levels the element has
• as you go the periodic table, you increase the size
• as you go the periodic table, you decrease the size
• with more of electrons, you also increase the
• this is when electrons push each other farther out
• the higher the number of in a period, the more compact(smaller) the atom becomes
• this increases as you go to the
• if you go, the looser the atom becomes and it gets bigger.

in summary, if you go and of the periodic table, the larger the atom becomes.
if you go and, the smaller the atom becomes

• is your largest atom and is your smallest atom

Explanation:

Atomic radius in elements is influenced by the number of electron - shells and the nuclear charge. The period number indicates the number of energy levels. Moving down the periodic table increases atomic size as more electron - shells are added. Moving across a period (left to right) decreases size as the nuclear charge pulls electrons in more tightly. Francium is generally the largest atom due to its position at the bottom - left of the periodic table, and Helium is one of the smallest due to its position at the top - right.

Answer:

• Electron - shells; nuclear charge
• Period
• Down
• Across (left to right)
• Repulsion; atomic radius
• Protons
• Right across a period
• Down a group
• Down; left
• Across (left to right); up
• Francium; Helium