Periodic Trends

Front

What are the two most reactive families on the periodic table?

Back

Halogens & Alkali metals.

Front

Which element has the largest atomic radius: oxygen, sulfur, phosphorus, or nitrogen?

Back

Phosphorus.

Front

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

Back

Calcium (Ca).

Front

Which atom has the largest atomic radius: potassium, rubidium, francium, or cesium?

Back

Francium.

Front

Why does Francium (Fr) have the lowest ionization energy in Group 1?

Back

Its 1 valence electron is very far from the nucleus, so little energy is needed to remove it.

Front

Define atomic radius.

Back

The distance from the nucleus of an atom to the outermost shell of electrons.

Front

What is ionization energy?

Back

The energy required to remove an electron from an atom in its gaseous state.

Front

Explain the trend of atomic radius in the periodic table.

Back

Atomic radius increases down a group and decreases across a period from left to right.

Front

What is the trend of ionization energy across a period?

Back

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

Front

What are alkali metals?

Back

The group of elements in Group 1 of the periodic table, known for being highly reactive.