Unit 2 - Periodic Table

Front

What is a group in the periodic table?

Back

A group is a vertical column in the periodic table where elements have similar chemical properties and the same number of valence electrons.

Front

What is a period in the periodic table?

Back

A period is a horizontal row in the periodic table that indicates the number of electron shells in the elements.

Front

What are valence electrons?

Back

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

Front

Which element has the largest atomic radius in Group 18?

Back

Radon (Rn) has the largest atomic radius in Group 18.

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

How does electronegativity change across a period?

Back

Electronegativity increases across a period from left to right due to increasing nuclear charge.

Front

How does electronegativity change down a group?

Back

Electronegativity decreases down a group because the distance between the nucleus and valence electrons increases.

Front

What is the significance of Group 2 elements?

Back

Group 2 elements, also known as alkaline earth metals, are characterized by having two valence electrons and are reactive.

Front

What is the atomic number of Beryllium?

Back

The atomic number of Beryllium (Be) is 4.

Front

What is the relationship between groups and chemical properties?

Back

Elements in the same group have similar chemical properties due to having the same number of valence electrons.