More cards in this set

What does the number of protons in a neutral atom always equal?

What is an ion?

The number of protons in an atom decides what?

What colour flame does lithium produce?

What element produces a yellow flame?

What element produces a purple flame?

The wavelengths emitted by atoms can be recorded as what?

What did Newlands organise elements into?

Why did Newlands periodic table not work?

Who organised elements into groups of three?