Chem. Chapter 4 Atomic Structure

Elements are different because they contain different number of _______

The total number of protons plus neutrons is called the...

A positively charged plate _____ the cathode ray, while a negatively charged plate ____ it

Who was the physicist that did the oil-drop experiment?

A cathode ray can be deflected by a ..........

What subatomic particle is neutrally charged?

What was the original name of an electron?

What was the relative mass of an electron?

What are the smaller sub-nuclear particles called?

Who came up with the plum pudding model?

In carbon-12 what does the 12 represent?

The modern process of discovery regarding atoms began with...

The first theory to relate chemical changes to events at the atomic level

The Greek philosopher ________ was among the first to suggest the existence of atoms.

Who discovered protons?

Who did the gold-foil experiment?

What is an atom?

What does amu stand for?

Atoms that have the same number of protons but number neutrons are called

Which one of these were not a part of Dalton's atomic theory