Periodic Trends

Front

What is ionization energy?

Back

The energy required to remove an electron from an atom.

Front

What does high electronegativity indicate about an atom?

Back

It indicates that the atom holds on to its electrons more tightly.

Front

Which element has a lower ionization energy than Scandium (Sc)?

Back

Calcium (Ca).

Front

What are the characteristics of Calcium?

Back

Calcium is a metal, has low electronegativity, and has 2 valence electrons.

Front

Which group of elements includes the most active elements?

Back

The halogens.

Front

What trend is observed in ionization energy across a period?

Back

Ionization energy generally increases from left to right across a period.

Front

What trend is observed in ionization energy down a group?

Back

Ionization energy generally decreases as you move down a group.

Front

Define electronegativity.

Back

Electronegativity is a measure of the ability of an atom to attract electrons in a chemical bond.

Front

What is the relationship between atomic size and ionization energy?

Back

As atomic size increases, ionization energy decreases.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.