Topic 4 The Periodic Table

Question 1

How did Mendeleev arrange the elements in his periodic table?

Answer 1

He arranged them in order of RAM, and in 8 groups based on their properties, leaving some gaps incase more elements were found

Question 2

How were Mendeleev’s ideas of grouping elements supported by later discoveries?

Answer 2

The discovery of electron orbits and how the number of electrons in the outer shell relate to its properties and so which group it would be put in by Mendeleev

Question 3

What problem did Mendeleev experience when grouping elements

Answer 3

Elements properties are based on their atomic number not their atomic mass and some elements have more neutrons , so based on RAM,, so some had to be moved around so they fit into the groups correctly

Question 4

How are elements arranged in the modern periodic table?

Answer 4

In order of atomic number, in rows based on number of electron orbits and in columns based on their properties/number of electron in their outer shell

Question 5

What is electronic configuration?

Answer 5

Electronic configuration is showing how many electrons an atom has in each orbit, can be drawn as a diagram, or written in the form 2, 8, 6(sulfur)

Question 6

Where are metals in the periodic table?

Answer 6

On the left, all left of the elements boron, silicon, germanium, antimony and polonium for their respective rows

Question 7

Where are the non-metals found on the periodic table?

Answer 7

From the elements boron, silicon, germanium, antimony and polonium for their respective rows