Periodic Trends

Front

What happens to ionization energy as you move across the periodic table from left to right?

Back

Ionization energy increases.

Front

Which element has similar chemical properties to oxygen and selenium, with an atomic number greater than krypton but less than iodine?

Back

Tellurium.

Front

How many valence electrons does a neutral atom of nitrogen have?

Back

5.

Front

What are the vertical columns of elements on the periodic table called?

Back

Groups.

Front

Which atom has the most valence electrons: Ca, C, Cl, or Si?

Back

Cl.

Front

What is the trend in atomic radius as you move down a group in the periodic table?

Back

Atomic radius increases.

Front

What is the trend in electronegativity as you move across a period from left to right?

Back

Electronegativity increases.

Front

What is the definition of a period in the context of the periodic table?

Back

A horizontal row of elements.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine how an atom can bond with others.

Front

What is the general trend in metallic character as you move across a period?

Back

Metallic character decreases.