Leaving Cert Chemistry Periodic Table: The following names are associat

Question

The following names are associated with the development of our knowledge of elements. Write in your answer-book the omitted name corresponding to each number 1 to 5.

Mendeleev
Dalton
The Greeks
Bohr
Davy

In ancient times _____ suggested that everything that exists was formed from the four elements: earth, air, fire and water. In the early 1800s _____ suggested that atoms were tiny indivisible particles. By the use of electrolysis _____ isolated elements such as sodium and potassium. By arranging the elements in order of increasing relative atomic mass (atomic weight) and by placing similar elements in groups _____ produced a systematic arrangement (an early periodic table) of the elements known to him. From looking at atomic spectra _____ came up with the theory that electrons moved around the nucleus of an atom in fixed energy levels (orbits).

The following names are associated with the development of our knowledge of elements - Leaving Cert Chemistry - Question a - 2007

Worked Solution & Example Answer:The following names are associated with the development of our knowledge of elements - Leaving Cert Chemistry - Question a - 2007

1: The Greeks

2: Dalton

3: Davy

4: Mendeleev

5: Bohr

Join the Leaving Cert students using SimpleStudy...