0415-W039(H) 2.5 Organising The Elements

______ is used to make weapons', tools, and jewellery.

After people were able to extract copper from its rock, a metal was added together to make an alloy called bronze. What is the name of the metal added to make the alloy?

• tin

• gold

• iron

• copper

An equipment used to help scientists to discover caesium and rubidium.

• spectroscope

• testing equipment

• thermometer

• beaker

Ida Tacke and her fellow scientists discovered two elements which are _______ and technetium.

List three types of evidence that Mendeleev used to help develop the periodic table

• Name of element

• the properties

• mass of one atom of the element

• their apperance

Who created the first periodic table?

• Lothar Mayer

• Dmitri Mendeleev

The smallest part of any substance is?

• Element

• Compound

• Atom

• Molecule

A substance that cannot be separated or broken down into simpler substances by chemical means is?

• Mixture

• Element

• Compound

• Molecule

How did Mendeleev organise his first periodic tables?

• Increasing atomic mass

• Increasing atomic number

• Descreasing atomic mass

• Descreasing atomic number

Which scientist studied evidence from experiments and suggested that atoms of each element have different masses?

• John Dalton

• Dmitri Mendeleev

• Cannizzaro

• Ida Tacke