Understanding the Development of the Periodic Table

Who is known as the 'father of the periodic table'?

• Henry Moseley

• Julius Meyer

• John Newlands

• Dmitri Mendeleev

How are elements arranged in the modern periodic table?

• Alphabetically

• By date of discovery

• By increasing atomic mass

• By increasing atomic number

Why did Mendeleev leave gaps in his periodic table?

• He made a mistake

• He recognized that not all elements had been discovered

• He wanted to add more elements later

• He ran out of space

What did John Newlands notice about the elements when ordered by atomic weights?

• Every eighth element had similar properties

• Every second element had similar properties

• Every tenth element had similar properties

• Every fifth element had similar properties

Which element was discovered in 1886 that matched Mendeleev's predictions?

• Germanium

• Silicon

• Tennesine

• Oxygen