Search for Order
Mendeleev
Periodic Law & Atomic Mass
Classes of Elements
Groups & Families
100

Who was the French chemist who classified elements into groups such as metals, nonmetals, gases, & earths?

What is Antoine Lavoisier or Antoine L?

100

What did Mendeleev organize?

What is elements?

100

What number is used to arrange elements in the modern periodic table?

What is atomic number?

100

Which type of element is usually shiny and a good conductor of electricity?

What is metals?

100

What are the electrons in the highest occupied energy level called?

What is valence electrons?

200

Which scientist developed an approach for organizing the elements? 

What is Dmitri Mendeleev?

200

How did Mendeleev arrange the elements in his table? 

What is By increasing relative mass and similar properties?

200

What does atomic number tell you?

What is the number of protons?

200

Which class of elements is usually a good conductor of heat and electricity?

What is metals?

200

What family is found in Group 1?

What is alkali metals?

300

What are the three major classes of elements?

What is metals, nonmetals, and metalloids?

300

What did Mendeleev leave in his table for elements that had not been discovered yet?

What is blank spaces?

300

What is the name of the repeating pattern of element properties?

What is the periodic law?

300

Which class has properties of both metals and nonmetals?

What are metalloids?

300

What family is found in Group 2? 

What is Alkali Earth Metals?

400

What did scientists use to group elements?

What is element properties?
400

Why did Mendeleev leave blank spaces in his table?

What is to predict that undiscovered elements would fit in those spaces?

400

What is an isotope?

What is atoms of the same element with different numbers of neutrons?

400

Which class of elements is usually poor conductors of heat and electricity?

What are nonmetals?

400

What family is found in Group 7A (17)?

What are halogens?

500

What element did Paul Emile-Lecoq de Boisbaudran name in honor of France?

What is gallium (Ga)?

500

What did Mendeleev leave in his table for elements that had not been discovered yet?

What is gallium and scandium 

500

Which isotope is used as the standard for comparing the masses of other atoms (amu)?

What is Carbon-12?

500

 Name one property of metals.

What is good conductors/malleable/ductile/shiny?

500

What family is found in Group 8A (18)?

What are noble gases?