coefficient vs subscript
History of periodic table
Element vs compound
isotopes
Valence Electrons
100

Coefficient definition 

What is properties of a product? 

100

This person discovered the periodic table 

Who is Dmitri Mendeleev? 

100

Element definition 

What is a pure substance that can't be broken down? 

100

isotopes definition 

What is 2 or more types of atoms that have the same atomic number? 

100

Where are the valence electrons 

What is the outermost of the shell? 

200

Subscript definition 

What is a letter that's slightly below the side of another character 

200

The year the periodic table was discovered 

What is 1869?


200

Compound definition 

What is a substance made up of two or more different chemical elements 

200

3 examples of isotopes 

What is carbon , hydrogen , and chlorine?

200

How to find valence electrons 

What is the number of valence electrons equal to the atoms main group number? 

300

What is the coefficient in 7x

What is 7?

300

This is the most unique element 

What is Carbon? (up to 10 million different compounds)

300

Element example 

What is carbon, oxygen, hydrogen, gold? 

300

Uranium and thorium appear in what 

What is water? 

300

How many valence electrons are there

What is 7?

400

What is the subject in this O2

What is 2? 

400

This is the only letter not in the periodic table 

What is J?

400

Compound example 

What is water, carbon dioxide and table salt? 

400

is oxygen considered an isotope 

yes 
400

One example of valence electrons 

 What is Chlorine? 

500

This country was named after the element silver 

What is Argentina? 

500

Is silver an compound or element 

What is a element?

500

the amount of atoms in an isotope 

what is 2 or more?

500

This element has exactly 4 valence electrons 

What is Carbon? 

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