Trends in periodic table

What are periodic trends?

are patterns observed in the properties of elements across periods and groups of the periodic table.

What is atomic radius?

is the distance from the nucleus to the outermost electron shell, which generally decreases across a period and increases down a group.

What is ionization energy?

is the energy required to remove an electron from an atom, which tends to increase across a period and decrease down a group.

What is electronegativity?

is a measure of an atom's ability to attract bonded electrons, which increases across a period and generally decreases down a group.

What does metallic character refer to?

refers to how readily an element can lose an electron, which decreases across a period and increases down a group.

What are groups in the periodic table?

are vertical columns in the periodic table that contain elements with similar chemical properties and the same number of valence electrons.

What are periods in the periodic table?

are horizontal rows in the periodic table, indicating the highest energy level of electrons in their atoms.

What is the significance of group 1 elements?

, are highly reactive and have one electron in their outermost shell, making them eager to lose that electron.

What are noble gases?

are elements in group 18 that are inert and have full outer electron shells, making them very stable and unreactive.

How does atomic number influence trends?

As the atomic number increases, the number of protons in the nucleus increases, affecting the attraction of electrons and thus influencing atomic radius, ionization energy, and electronegativity.