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Periodic Table

A tabular arrangement of chemical elements, organized by increasing atomic number and grouped by similar properties.

Atomic Size

The size of an atom, which decreases as you move from left to right across the periodic table due to increased nuclear charge.

Electronegativity

A measure of an element's ability to attract and hold electrons when bonded to other atoms.

Nuclear Charge

The total charge of the nucleus, determined by the number of protons, which affects the attraction between the nucleus and electrons.

Moving across a period, the electronegativity values tend to be larger/smaller?

Larger

Moving down a column results in the values getting larger/smaller?