Periodic Trends

Front

What are periodic trends?

Back

Periodic trends refer to the patterns and variations in the properties of elements across the periodic table, including atomic radius, electronegativity, ionization energy, and metallic character.

Front

What is atomic radius?

Back

Atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons. It generally increases down a group and decreases across a period.

Front

What happens to atomic radius as you move down a group in the periodic table?

Back

Atomic radius increases as you move down a group due to the addition of energy levels.

Front

What happens to atomic radius as you move across a period from left to right?

Back

Atomic radius decreases as you move across a period from left to right due to increased nuclear charge pulling electrons closer to the nucleus.

Front

What is electronegativity?

Back

Electronegativity is the ability of an atom to attract electrons in a chemical bond. It generally increases across a period and decreases down a group.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom. It generally increases across a period and decreases down a group.

Front

How does metallic character change across a period?

Back

Metallic character decreases as you move from left to right across a period.

Front

How does metallic character change down a group?

Back

Metallic character increases as you move down a group in the periodic table.

Front

Which element has the most valence electrons: Ca, C, Cl, or Si?

Back

Cl has the most valence electrons (7).

Front

Which element has the largest atomic radius in Group 18: He, Xe, Ne, or Rn?

Back

Rn has the largest atomic radius in Group 18.