The Perioic Table

Question 1

How did Mendeleev group the elements?

Answer 1

In order of chemical properties and mass number

Question 2

How did Mendeleev predict elements and their properties?

Answer 2

He left gaps for undiscovered elements and when they were discovered they and their properties fitted perfectly into the gaps he has left

Question 3

How is a modern periodic table ordered and why?

Answer 3

In order of atomic number die to the discovery of isotopes and their varying abundance

Question 4

What does increasing atomic number of an electron mean in terms of the atoms size?

Answer 4

More protons, more electrons, more shells, bigger atom

Question 5

What are periods and what do they tell us?

Answer 5

Periods run in rows across the periodic table and tell us the number of electron shells

Question 6

What are groups and what do they tell us?

Answer 6

They run vertically down the periodic table and tell us the amount of electrons on the outer shell

Question 7

What separates metals and non-metals?

Answer 7

The metal-non metal dividing line

-it runs beneath boron and between polonium and astatine

Question 8

What is the standard electronic configuration?

Answer 8

2. 8.8.2

- (structure is asking you to draw shells)

Question 9

How do you work out relative atomic mass?

Answer 9

(Mass number x abundance) + (mass number x abundance)

Divided by total abundance