The periodic table and its development

Question 1

Why did Newlands Octaves not work?

Accepted Answer

He assumed all elements had been found, he grouped some elements that weren't similar

Question 2

A horizontal row is called a ....

Accepted Answer

period

Question 3

Why did Mendeleev's version of the periodic table work?

Accepted Answer

He left gaps

Question 4

The presence of ________ explained why some atomic weights were oddly heavy?

Accepted Answer

Isotopes

Question 5

In the modern periodic table elements are arranged in order of increasing........

Accepted Answer

atomic number

Question 6

Metals will react by..

Accepted Answer

Losing electrons

Question 7

Which scientist first arranged the elements in the order of atomic weight?

Accepted Answer

Dalton

Question 8

What does the group number tell us?

Accepted Answer

The number of electrons in the outer shell

Question 9

Newlands noticed that the properties of every ________element seemed similar?

Accepted Answer

eighth

Question 10

A vertical column is called a

Accepted Answer

group

Questions 10