1.1 The Early Periodic Table

Question 0

What didn’t scientists know about atoms during the early 19th century?

Answer 0

During the early 19th century, scientists didn’t know about the structure of atoms.

Question 1

On what basis were elements classified during the early 19th century?

Answer 1

During the early 19th century, elements were classified based on their properties and atomic weights.

Question 2

What is the result on the Periodic Table of scientists not knowing about the structure of atoms?

Answer 2

The result on the Periodic Table of scientists not knowing about the structure of atoms was that elements were arranged based on atomic weight, rather than proton number, for example.

Question 3

During the early 19th century, what did scientists know about the structure of atoms?

Answer 3

They knew nothing.

Question 4

What is the relevance of properties and atomic weights, with regards to the classification of elements during the early 19th century?

Answer 4

The relevance of properties and atomic weights,during the early 19th century with regards to the classification of elements, was that these were used to classify the elements.

Question 5

How were elements ordered in Newland’s Table?

Answer 5

In Newland’s Table, elements were ordered based on atomic weight.

Question 6

What was the main weakness of Newland’s Table?

Answer 6

The main weakness of Newland’s Table was that he didn’t take account of elements that were unknown at the time.

Question 7

What is the relevance of atomic weight, with regards to Newland’s Table?

Answer 7

The relevance of atomic weight, with regards to Newland’s Table is that elements were ordered based on atomic weight.

Question 8

What did Newlands fail to take account of in his table?

Answer 8

Newlands failed to take account of unknown elements in his table.

Question 9

According to Newlands, what was repeated every 8th element?

Answer 9

According to Newlands, similar elemental properties were repeated every 8th element.

Question 10

What was Newlands’ theory that similar properties were repeated every 8th element called?

Answer 10

Newlands’ theory that similar properties were repeated every 8th element was called the Law of Octaves?

Question 11

What was Newlands’ Law of Octaves?

Answer 11

Newlands’ Law of Octaves was the theory that similar properties were repeated every 8th element.

Question 12

How many elements were known at the time that Newlands constructed his table?

Answer 12

At the time that Newlands constructed his table, 62 elements were known.

Question 13

What were the 62 elements known of at the time Newlands constructed his table grouped into?

Answer 13

The 62 elements known of at the time that Newlands constructed his table were grouped into 7 groups.

Question 14

What is the significance of ‘62 elements’, at the time that Newlands constructed his table?

Answer 14

The significance of ‘62 elements’ at the time that Newlands constructed his table is that this is the number of elements that were known of.

Question 15

What were put into 7 different groups at the time that Newlands constructed his table?

Answer 15

At the time that Newlands constructed his table, the things that were put into 7 different groups were the 62 known elements.

Question 16

What was the main issue with Newlands’ Table?

Answer 16

The main issue with Newlands’ Table was that after Calcium, the properties didn’t match well within groups.

Question 17

What is the significance of this: after Calcium, the properties didn’t match well within groups on Newlands’ Table?

Answer 17

The significance of this: after Calcium, the properties didn’t match well within groups is that it was the main issue with Newlands’ Table.

Question 18

What was the result of the fact that after Calcium, properties didn’t match well within groups on Newlands’ Table?

Answer 18

The result of the fact that, after Calcium, the properties didn’t match well within groups on Newlands’ Table, was that many scientists didn’t accept his ideas.

Question 19

Why did many scientists refuse to accept Newlands’ ideas?

Answer 19

Many scientists refused to accept Newlands’ ideas because, on his table, after Calcium, the properties didn’t match well within groups.

Question 20

What did Mendeleev leave gaps for on his table?

Answer 20

On his table, Mendeleev left gaps for elements that were unknown at the time.

Question 21

When did both Mendeleev and Newlands come up with their tables?

Answer 21

Both Mendeleev and Newlands came up with their ideas in the late 19th century.

Question 22

What was Mendeleev’s table the basis for?

Answer 22

Mendeleev’s Table was the basis for the modern Periodic Table.

Question 23

How did Mendeleev address unknown elements to the time on his table?

Answer 23

Mendeleev addressed unknown elements at the time on his table by leaving gaps for them.

Question 24

How is Mendeleev's Table related to the Periodic Table?

Answer 24

Mendeleev's Table is related to the Periodic Table in that it was the basis for it.

Question 25

What was important about the groups of known elements at the time on Mendeleev's Table?

Answer 25

The important thing about the groups of known elements at the time on Mendeleev's Table, is that they had similar properties.

Question 26

What did Mendeleev use his table to predict?

Answer 26

Mendeleev used his table to predict the properties of unknown elements.

Question 27

What on Mendeleev's Table had similar properties?

Answer 27

On Mendeleev's Table, the groups of known elements at the time had similar properties.

Question 28

What about missing elements did Mendeleev predict?

Answer 28

Mendeleev predicted the properties of missing elements.

Question 29

What was the biggest strength of Mendeleev's Table?

Answer 29

The biggest strength of Mendeleev's Table was that when new elements were discovered, his predictions were proved correct.

Question 30

What of Mendeleev's was proved correct when new elements were discovered?

Answer 30

When new elements were discovered, Mendeleev's predictions about the properties of these new elements were proved correct.

Question 31

What was the result of Mendeleev's predictions about the properties of new elements being correct?

Answer 31

The result of Mendeleev's predictions about the properties of new elements being correct was that other scientists more readily accepted his ideas.

Question 32

What made other scientists more readily accept Mendeleev's ideas?

Answer 32

The thing that made other scientists more readily accept Mendeleev's ideas was that when new elements were discovered, Mendeleev's predictions about their properties were proved correct.