Elements/Periodic Table EOG review

Front

Who created the periodic table of elements?

Back

Dmitri Mendeleev

Front

An element is identified by what characteristic?

Back

Its number of protons.

Front

Which element is a hard, non-magnetic semiconductor?

Back

Silicon (Si)

Front

How are periods organized on the periodic table?

Back

Increasing atomic number from left to right.

Front

What are the columns of the periodic table called?

Back

Groups or families.

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 atomic mass of an element?

Back

It represents the average mass of an element's isotopes.

Front

What are isotopes?

Back

Atoms of the same element with different numbers of neutrons.

Front

What is a metal?

Back

An element that is typically shiny, malleable, and a good conductor of heat and electricity.

Front

What is a non-metal?

Back

An element that lacks the characteristics of metals, often brittle and poor conductors.