Periodic Table

Front

What do the vertical columns on the periodic table tell us?

Back

The number of valence electrons (electrons on the outermost shell)

Front

What do the horizontal rows on the periodic table tell us?

Back

The number of orbitals

Front

Who discovered the electrons?

Back

Thomson

Front

How many orbitals does Nickel have?

Back

4

Front

How many valence electrons and energy levels does (Pb) lead have?

Back

4 valence electrons and 6 energy levels (orbitals)

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 the periodic table's arrangement?

Back

Elements are arranged by increasing atomic number, which reflects their properties.

Front

What are groups in the periodic table?

Back

Vertical columns that group elements with similar chemical properties.

Front

What are periods in the periodic table?

Back

Horizontal rows that indicate the number of energy levels in an atom.

Front

What is a valence electron?

Back

An electron in the outermost shell of an atom that can participate in chemical bonding.