Periodic Table & Trends

Front

What are the vertical columns in the Periodic Table called?

Back

Groups

Front

Which element has a lower ionization energy than Scandium (Sc)?

Back

Calcium (Ca)

Front

How many valence electrons does Potassium (K) have?

Back

1

Front

Which element has a larger atomic radius than Zinc (Zn)?

Back

Strontium (Sr)

Front

How is the Modern Periodic Table of Elements arranged?

Back

By atomic number

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What trend is observed in atomic radius across a period?

Back

Atomic radius decreases from left to right across a period.

Front

What trend is observed in ionization energy down a group?

Back

Ionization energy decreases as you move down a group.

Front

What are periods in the Periodic Table?

Back

Horizontal rows in the Periodic Table.

Front

What is the significance of valence electrons?

Back

They determine an element's chemical properties and reactivity.