Periodic table

Question 1

How did Newland arrange the periodic table?

Answer 1

-Order of increasing atomic weights
-Elements in rows that have similar properties
-not all elements in rows have similar properties

Question 2

How did Mendeleev arrange his periodic table?

Answer 2

-Order of increasing atomic weights
-left gaps for undiscovered elements
-altered order of elements to fit properties better

Question 3

Mendeleev then placed elements with similar properties in columns called ___?

Answer 3

Groups

Question 4

When the next element did not fit the pattern what did Mendeleev do?

Answer 4

He left a gap

Question 5

Why was Mendeleev not able to include noble gases (group 0) in his periodic table?

Answer 5

Because the noble gases weren’t discovered by 1869

Question 6

Name the particle that allowed the elements to be arranged in order of their atomic number in the modern periodic table

Answer 6

Proton

Question 7

In their periodic tables, Newland and Mendeleev arranged the elements in order of what?

Answer 7

Atomic weight

Question 8

In the modern periodic table, what are the elements arranged in order of?

Answer 8

Atomic number

Question 9

What is the Morden name for atomic weights?

Answer 9

Relative atomic mass

Question 10

Why did Mendeleev’s periodic table become more widely accepted than previous versions?

Answer 10

-Mendeleev had predicted properties of missing elements
-elements were discovered that filled the gaps
-properties of these elements matched Mendeleev’s predictions