Chemistry Form 4 Topic 4.1 & 4.2

This scientist classified elements according to certain groups such as gases, non-metals, metals and metal oxides.

• Johann W. Dobereiner

• Antoine Lavoisier

• John Newlands

• Lothar Meyer

Johann W. Dobereiner propose the Law of Octaves

• True

• False

This scientist plotted the graph of atomic volume against atomic mass of elements. He found that the elements at equivalent positions on the curve of the graph had similar chemical properties.

• John Newlands

• Johann W. Dobereiner

• Dmitri Mendeleev

• Lothar Meyer

Both of these scientists left several empty spaces in their periodic table to be filled by elements, yet to be discovered.

• Dmitri Mendeleev

• Henry Moseley

• John Newlands

• Johann W. Dobereiner

Elements in the Periodic Table of Elements are arranged in

• descending order of proton numbers

• descending order of atomic sizes

• ascending order of proton numbers

• ascending order of nucleon numbers

Several new elements which were discovered were added into Period 7 of the Periodic Table of Elements. Which of these are the new elements?

• Moscovium

• Potassium

• Nihonium

• Rubidium

Two main components of the Periodic Table are

• Column

• Period

• Group

• Row

The number of ___________________ will determine the

position of the group of an element.

• total electrons

• protons

• valence electrons

There are _________ groups and __________ periods in the Periodic Table of Elements

• 18, 7

• 7, 18

The electron arrangement of Aluminium is 2.8.3. In which group does Aluminium belongs in Periodic Table of Elements?

• Group 3

• Group 13