Periodic Table Element Symbols
US Presidents
Famous Explorers
Ancient Philosophers
Jewish Holidays
100

The symbol PD is associated with this element on the periodic table.

What is Palladium?

100

This president was the only president in American History to be elected unanimously. 

Who is George Washington?

100

Known as China's greatest explorer, this explorer made 7 great voyages to Southeast Asia, South Asia, the Middle East, and Africa over the course of 28 years.

Who is Admiral Zheng He?

100

This philosopher was known for wearing the same old coat every day, never wearing shoes, and being very ugly. 

Who is Socrates?

100

This holiday is also known as The Jewish New Year.

What is Rosh Hashanah?

200

The symbol associated with the atomic number 25 on the periodic table of elements. 

What is Mn (Manganese)?

200

This president organized The Citizens Cornet Band to play at political rallies for both parties. 

Who is Warren G. Harding?

200

She was the first female circumnavigator. 

Who is Jeanne Baret?

200

This philosopher was one of the first modern political scientists and is best known for his political treatise, The Prince.

Who is Niccolo di Bernado dei Machiavelli?

200

This holiday commemorates the time when the Hebrews lived in the Sinai wilderness on their way to the Promised Land.

What is Sukkot?

300

He, Ne, Ar, Kr, Xe, Rn, and Og are all recognized as this type of element. 

What are Noble Gases?

300
This president, in 1942, had a side job as a model and even modeled for the cover of Cosmopolitan. 

Who is Gerald Ford?

300

After losing the 1912 election, this former president undertook an exploration of South America.

Who is Theodore Roosevelt?

300

This philosopher, in old age, committed suicide by starvation because he had gone blind and was deprived of his ability to observe. 

Who is Eratosthenes?

300

On this day, people of Jewish faith all over the world mourn the loss of the 6 million lives lost during the Holocaust.

What is Yom HaShoah?

400

Bi also known as Bismuth is this kind of metal.

What is Post-Transitional Metal?

400

This president gave the longest inauguration speech to date out of any other US president to be elected. 

Who is William Henry Harrison?

400

This Carthaginian explorer sailed through the Strait of Gibraltar and on southwards to the African coast.

Who is Hanno the Navigator?

400

In 560 BCE, this philosopher became one of the first people to realize the Earth could not be flat. Instead, he thought it was shaped like a cylinder.

Who is Anaximander?

400

The day marking the end and the beginning of the annual Torah reading cycle.

What is Simchat Torah?

500

This symbol is next in the atomic number sequence after Mo on the periodic table of elements. 

What is Tc (Technium)?

500

Germany declared war on France just one week before this president planned to celebrate his 40th birthday in London. 

Who is Herbert Hoover?

500

The step-brother of Sir Walter Raleigh, he sailed from England in 1583 and explored the eastern coastlines of Newfoundland and Nova Scotia in Canada. 

Who is Sir Humphrey Gilbert?

500

The first Ancient Greek philosopher to suggest that the Earth revolved around the Sun.

Who is Aristarchus of Samos?

500

This holiday marks the 33rd day of the 49-day 'Omer' period between Passover and Shavuot.

What is Lag B'Omer?

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