PERIODIC TRENDS

Front

What do families or groups in the periodic table have in common?

Back

They have similar properties.

Front

What is the energy required to remove an electron from an atom called?

Back

Ionization energy.

Front

Why does Francium (Fr) have the lowest ionization energy in Group 1?

Back

Its 1 valence electron is very far from the nucleus, so little energy is needed to remove it.

Front

What happens to atomic size as you move across a period in the periodic table?

Back

Atoms tend to get smaller because they have more protons.

Front

Which element has the largest atomic radius in Period 4?

Back

Potassium (K).

Front

What is electronegativity?

Back

The tendency of an atom to attract electrons in a chemical bond.

Front

How does atomic radius change down a group in the periodic table?

Back

Atomic radius increases as you move down a group.

Front

What is the trend of ionization energy as you move across a period?

Back

Ionization energy generally increases from left to right across a period.

Front

What is the relationship between atomic number and the number of protons in an atom?

Back

The atomic number is equal to the number of protons in an atom.

Front

What is the significance of valence electrons in determining an element's chemical properties?

Back

Valence electrons determine how an element reacts chemically with other elements.