4. Atoms and Elements

Metalloids are located where on the periodic table?

In the modern periodic table, elements are arranged primarily by increasing what property?

In the periodic table, what are the horizontal rows called?

In the periodic table, what is a period?

Elements are organized on the modern periodic table primarily according to which property?

In the periodic table, which element has the greatest number of protons in its nucleus (i.e., the highest atomic number)?

In the periodic table, the majority of elements are classified as which type?

In the periodic table, the horizontal rows are called what?

How are elements on the periodic table arranged?

Which element is considered the first in the series commonly referred to as the rare earth metals (lanthanides)?

How is the modern periodic table primarily arranged?

Which element is classified as a nonmetal and is a solid at standard temperature and pressure (STP)?

How are elements arranged in the modern periodic table?

Which element makes up most of Earth’s atmosphere (by volume)?

In developing the periodic table, Dmitri Mendeleev predicted the existence and properties of an undiscovered element he called eka-silicon. Which element was later discovered that matched this prediction?