Periodic Table

Front

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

Back

The number of orbitals.

Front

What is the name of the element with the symbol 'Na'?

Back

Sodium.

Front

Who discovered the nucleus of the atom?

Back

Rutherford.

Front

What is the atomic mass of sodium?

Back

58.693.

Front

How many protons does nickel have?

Back

28.

Front

What is the periodic table?

Back

A tabular arrangement of chemical elements, organized by atomic number, electron configuration, and recurring chemical properties.

Front

What does the atomic number represent?

Back

The number of protons in the nucleus of an atom.

Front

What are valence electrons?

Back

Electrons in the outermost shell of an atom that determine its chemical properties.

Front

What is the significance of groups in the periodic table?

Back

Elements in the same group have similar chemical properties and the same number of valence electrons.

Front

What is an isotope?

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.