PS.Chem2

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.

Front

Which element has the largest atomic radius in Period 4?

Back

Potassium (K) has the largest atomic radius in Period 4.

Front

What are halogens?

Back

Halogens are a group of elements in Group 17 of the periodic table, known for being highly reactive nonmetals.

Front

Which element is a halogen?

Back

Chlorine (Cl) is a halogen.

Front

What are shielding electrons?

Back

Shielding electrons are electrons in the lower energy levels that reduce the effective nuclear charge felt by the outermost electrons.

Front

How many valence electrons does arsenic have?

Back

Arsenic has 5 valence electrons.

Front

What do elements in the same group of the periodic table have in common?

Back

Elements in the same group have the same number of valence electrons.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an atom can bond with other atoms.

Front

What is the periodic trend for atomic radius across a period?

Back

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

Front

What is the periodic trend for atomic radius down a group?

Back

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