PERIODIC TABLE TEST REVIEW

Front

What is the element described as shiny, having properties of both metals and nonmetals, and having three valence electrons?

Back

Boron (B)

Front

What type of element is a poor conductor of heat and electricity?

Back

Nonmetals

Front

Who organized the periodic table by atomic number?

Back

Moseley

Front

How many valence electrons make most atoms stable (nonreactive)?

Back

8

Front

What are the horizontal rows in the Periodic Table called?

Back

Periods

Front

What is the term for elements that have properties of both metals and nonmetals?

Back

Metalloids

Front

What is the maximum number of valence electrons an atom can have in its outer shell?

Back

8

Front

What are the vertical columns in the Periodic Table called?

Back

Groups or Families

Front

Which element is known as a metalloid and is used in semiconductors?

Back

Silicon (Si)

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.