History of Elements

Multiple Choice

Dmitri Mendeleev arranged the 63 known elements at the time by __________________.

• atomic number

• atomic mass

• neutron number

• none of the above

Multiple Choice

Why did Dmitri Mendeleev leave spaces in his periodic table?

• He left spaces for undiscovered elements.

• He left spaces for discovered elements.

• He left spaces to be more organized.

• none of the above

Multiple Choice

Henry Moseley's X-rays showed that each element had a unique positive charge in the nucleus. This led to the discovery of the ________________.

• atomic number

• atomic mass

• neutrons only

• none of the above

Multiple Choice

The modern periodic table is arranged by ___________________.

• atomic number

• atomic mass

• neutrons only

• none of the above

Match

Match the following

• 1969 Periodic Table was organized by:

• Modern Periodic Table is organized by:

Group

Period

Atomic Mass

Atomic Number

• Group

• Period

• Atomic Mass

• Atomic Number

Multiple Choice

Alkali Metals are..

• in group 1 and are the most reactive metals.

• in group 2 and are the second most reactive metals.

• in group 17 and are the most reactive nonmetals.

• in group 18 and are inert (unreactive).

Multiple Choice

Alkaline Earth Metals are..

• in group 1 and are the most reactive metals.

• in group 2 and are the second most reactive metals.

• in group 17 and are the most reactive nonmetals.

• in group 18 and are inert (unreactive).

Match

Match the following

• in group 1 and are the most reactive metals.

• In group 2 and are the 2nd most reactive metals.

• In group 17 and are the most reactive nonmetals..

• Complete, Stable!

• Metallic elements that have valence electrons in two shells instead of only one.

Alkali Metals

Alkaline Earth Metals

Halogens

Noble Gases

Transition Metals

• Alkali Metals

• Alkaline Earth Metals

• Halogens

• Noble Gases

• Transition Metals

Reorder

Reorder the following according to how the Periodic Table is organized:

• Metals

  (except Hydrogen)

• Metalloids

• Nonmetals

1

2

3

• 1
• 2
• 3

Draw

Label the Valence Electrons, Oxidation Numbers, and Diatomic Elements on this Periodic Table.

Multiple Choice

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

Multiple Choice

The modern periodic table is organized by the number of __________ atomic number.

• decreasing

• increasing

• constant

Multiple Choice

Who arranged the first periodic table.

• Mosely

• Einstein

• Mendeleev

• Bohr

Multiple Choice

What property did Menedleev use to organize his first periodic table?

• atomic number

• atomic mass

• alphabetical order

• chemical properties

Multiple Choice

Why did scientists need/want to organize the elements?

• Scientists like things organized

• make it easier to understand the elements

• have one list of the known elements.

• none of the above

Multiple Choice

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

• He didn't know what to put there.

• Undiscovered elements not yet known.

• Multiple elements could have fit

• He forgot to add the elements in.

Multiple Choice

Moseley discovered that the ________ was the most fundamental property needed for organization.

• atomic mass

• mass number

• number of protons

Multiple Choice

A ___________ is an arrangement of elements in columns.

• columns

• rows

• periodic table

• electron shell

Multiple Choice

In the modern periodic table elements are arranged by:

• atomic mass

• atomic number

• valence electrons

• number of isotopes

Multiple Choice

I am a British scientist who came up with today's periodic table of elements that is based on ATOMIC NUMBER. Who am i?

• Henry G.J Mosely

• J.J Thomson

• Erwin Schrodinger

• John Dalton