Chapter 4 Test

The electron was discovered by...

Atoms are electrically neutral which means they have the same number of...

The element bromine (Br) has _____ neutrons

A cathode ray is attracted to...

Who was the scientist who discovered the proton?

Using the shorthand notation what can you determine about the atom?

How do isotopes of an element differ?

The element potassium (K) has _____ number of electrons.

Why was Democritus' Philosophy NOT accepted

The three subatomic particles are...

Which scientist discovered the concept of the nucleus with his gold-foil experiment?

Which scientist carried out the experiment to find the quantity of an electron's charge?

The mass of any atom depends on...

Atoms were indivisible and indestructible was whose philosophy?  

Who was among the first to discover the existence of the atom?

What makes one element different from the other?

The Rutherford atomic model is also know as the...

The smallest part of an element that retains its identity in a chemical reaction

The cathode ray is...

Who was the scientist that discovered the neutron?

The element copper (Cu) has ______ protons

Who do we give credit to for the modern atomic theory?

A cathode ray is repelled by...

If the atomic number for copper is 63.546 amu which isotope is more abundant?

Despite their small size atoms can be seen by...