Unit 1: Atomic Structure and Periodic Table Review

Front

What happens to the atomic radius as you move down a group in the periodic table?

Back

It increases.

Front

What happens when an atom gains or loses electrons?

Back

It becomes an ion with a net charge.

Front

Which group in the periodic table is characterized by a lack of reactivity due to a complete valence shell?

Back

Noble gases (Group 8).

Front

Elements in the same period have the same number of:

Back

energy levels.

Front

An atom becomes _______ when it loses electrons.

Back

Positive.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the significance of valence electrons?

Back

They determine an atom's chemical properties and reactivity.

Front

What is the periodic law?

Back

The properties of elements are a periodic function of their atomic numbers.

Front

What are alkali metals?

Back

Elements in Group 1 of the periodic table, highly reactive and have one valence electron.

Front

What are halogens?

Back

Elements in Group 7 of the periodic table, known for their reactivity and having seven valence electrons.