Y10 The development of the modern periodic table

In the periodic table, a period is a...

• column

• row

• box

• line

In the periodic table, a group is a...

• column

• row

• box

• line

What was Dmitri Mendeleev's greatest contribution to the history of the periodic table?

• He arranged all of the known elements by their atomic number
• He realised that there was a pattern of reactivity which repeated every 8 elements
• He predicted the existence (and properties) of new elements
• He identified the "law of triads" which became the groups

The alkali metals are in group...

• 0

• 1

• 7

• 8

The halogens are in group...

• 0

• 1

• 7

• 8

Who arranged the first periodic table?

• Mosely

• Einstein

• Mendeleev

• Bohr

Who arranged the known elements into horizontal rows of increasing atomic weight leaving gaps for as yet undiscovered elements?

• Mendeleev

• Meyer

• Newlands

• Moseley

In the modern periodic table, elements are arranged by:

• atomic mass

• atomic number

• valence electrons

• number of isotopes

Why were there blank spaces left in Mendeleev's periodic table?

• He didn't know what to put there

• They were for as yet undiscovered elements

• Multiple elements could have fit

• He forgot to add the elements in

Mendeleev classified elements based on not only atomic mass but what else?                                                   

• reactivity
• boiling points
• physical properties only 
•  chemical & physical properties