Development Of The Perodic Table

Question 1

B4 atomic structure was discovered what was used to order elements

Answer 1

Atomic weight

Question 2

What were the elements grouped in Mendeleev table of elements

Answer 2

Grouped usin their properties instead of strictly following atomic weight

Question 3

Why did Mendeleev leve gaps

Answer 3

To keep the groups together and now these gaps are filled with elements discovered later

Question 4

Why did mendeleev swap some elements round in places

Answer 4

Becus at places where ordering in atomic weight didn’t fit the pattern

Question 5

Now what is the group number based on

Answer 5

The number of electrons on the outer shell

Question 6

Now what’s the period number bout

Answer 6

The number of shells with electrons in

Question 7

What are the elements ordered in now

Answer 7

The increasing atomic number