Chemistry S2-Final Flashcard

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom or ion in its gaseous state.

Front

Which element has the highest ionization energy?

Back

Helium has the highest ionization energy among all elements.

Front

What is the trend of ionization energy across a period?

Back

Ionization energy generally increases 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 due to increased distance of the outer electrons from the nucleus and increased shielding effect.

Front

What is atomic radius?

Back

Atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons.

Front

What is the trend of atomic radius across a period?

Back

Atomic radius generally decreases across a period from left to right due to increased nuclear charge pulling electrons closer.

Front

What is the trend of atomic radius down a group?

Back

Atomic radius generally increases down a group due to the addition of electron shells.

Front

What are cations and anions?

Back

Cations are positively charged ions formed by the loss of electrons, while anions are negatively charged ions formed by the gain of electrons.

Front

What is the formula for Calcium nitride?

Back

The formula for Calcium nitride is Ca3N2.

Front

What are valence electrons?

Back

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