Elements

Which of these are not physical properties of an element?

Which scientist discovered small negative charges and positive charges in atoms?

What is the atomic number of Calcium?

Who is credited with organizing the Periodic Table?

What are elements made out of?

Who discovered the theory of relativity that explains mass and energy in atoms?

Which one is not a Group of elements?

Which one is not a compound?

Methane is a gas associated with?

There are _______ known elements?

What is the chemical formula for water?

Protons have ___________ charges.

How are the elements grouped?

Electrons have _______________ charges.

______ are located around the nucleus in orbitals.

The noble gases have __________ reactivity?

Who received a nobel prize in physics for measuring the negative charge of electrons?

Who came up with the word "element"?

Neutrons and _________ are located in the nucleus of an atom.

Which of these people designed atomic models?

What element has the lowest atomic mass?