quiz 4

Question 1

Explain why Mendeleev put some elements in groups and changed the weight based order

Answer 1

To group the elements based on their properties

Question 2

State why the periodic table is called the periodic table

Answer 2

Similar properties occur at regular intervals

Question 3

Before Mendeleev, describe how scientists ordered the elements

Answer 3

By their atomic weights

Question 4

Describe the information about electronic structure provided by an elements period in the periodic table

Answer 4

How many shells an atom has

Question 5

Describe the information about electronic structure provided by an elements group in the periodic table

Answer 5

How many electrons an atom has in the outer shell

Question 6

Explain why Mendeleev’s periodic table was eventually accepted by other scientists

Answer 6

Elements were discovered which filled the gaps and matched the properties he predicted

Question 7

Give the 2 ways in which element are ordered in the periodic table

Answer 7

First by their atomic number, then in groups based on their properties

Question 8

Explain why Mendeleev left gaps in his periodic table

Answer 8

for elements that had not been discovered yet