Periodic Table

Question 1

The smallest particle that can exist on its own

Answer 1

Atom

Question 2

A substance made up of one type of atom

Answer 2

Element

Question 3

Harry He Likes Beer Bottled Cold Not Over Frothy Nelly Nanny Might Although Silly Person She Climbs Around Kinky Caves.

Answer 3

Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminium, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Potassium, Calcium.

Question 4

On February 14th, I wrote everything I knew about each element on separate cards and tried to find patterns in their arrangement.

Answer 4

Dimitri Mendeleev

Question 5

First

Answer 5

I arranged them with increasing atomic mass

Question 6

Secondly

Answer 6

I arranged them in columns if they had similar properties

Question 7

Thirdly

Answer 7

I left spaces for undiscovered elements

Question 8

When did he arrange all the known elements into a pattern according to their properties?

Answer 8

19th century

Question 9

Vertical columns are called

Answer 9

Groups

Question 10

Horizontal rows are called

Answer 10

Periods