Unit Four

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds with other atoms.

Front

How many valence electrons does potassium (K) have?

Back

Potassium (K) has 1 valence electron.

Front

What does it mean for valence electrons to be 'not bonded'?

Back

Not bonded valence electrons are those that are not involved in chemical bonds with other atoms.

Front

How many total valence electrons are not bonded in a molecule with 4 unbonded electrons?

Back

There are 4 unbonded valence electrons.

Front

How many electrons are shared in a single covalent bond?

Back

In a single covalent bond, 2 electrons are shared between two atoms.

Front

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

Back

Francium has the largest atomic radius.

Front

What is electronegativity?

Back

Electronegativity is a measure of an atom's ability to attract and hold onto electrons in a chemical bond.

Front

Which element has the highest electronegativity: Lithium (Li), Potassium (K), Francium (Fr), or Sodium (Na)?

Back

Lithium (Li) has the highest electronegativity.

Front

What is 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 electronegativity in the periodic table?

Back

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