Periodic Trends

Front

What is the atomic radius?

Back

The 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

Which atom has the largest atomic radius among potassium, rubidium, francium, and cesium?

Back

Francium has the largest atomic radius among these elements.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from a gaseous atom or ion.

Front

Which element has a lower ionization energy than Scandium (Sc): Helium (He), Titanium (Ti), Calcium (Ca), or Magnesium (Mg)?

Back

Calcium (Ca) has a lower ionization energy than Scandium.

Front

What is electronegativity?

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

Front

Which element in Period 3 has the lowest electronegativity: Na, Cl, Ar, or Mg?

Back

Argon (Ar) has the lowest electronegativity in Period 3.

Front

What periodic group has the smallest atomic radius?

Back

Noble Gases have the smallest atomic radius among the periodic groups.

Front

What is the trend of atomic radius across a period?

Back

The atomic radius decreases across a period from left to right due to increasing nuclear charge.

Front

What is the trend of ionization energy down a group?

Back

Ionization energy generally decreases down a group as the atomic radius increases.

Front

What is the trend of electronegativity across a period?

Back

Electronegativity generally increases across a period from left to right.