Atoms and Periodic Table

Front

What are the elements called in Groups 3-12 of the periodic table?

Back

Transitional Metals

Front

Elements in the same _________ have the same number of valence electrons.

Back

Group

Front

What is the average mass of an element with isotopes: 24.1% at 75.23 amu, 48.7% at 74.61 amu, and 27.2% at 75.20 amu?

Back

74.92 amu

Front

If an atom has an atomic mass of 27 and an atomic number of 13, how many neutrons does it have?

Back

14

Front

__________ are the smallest unit of an element that maintains the properties of the element.

Back

Atoms

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 groups?

Back

Elements in the same group have similar chemical properties.

Front

What is an isotope?

Back

Atoms of the same element with different numbers of neutrons.

Front

What does the atomic mass of an element represent?

Back

The weighted average mass of an element's isotopes.

Front

What are noble gases?

Back

Elements in Group 18 that are inert and have full valence shells.