Chapter 4 - Atomic Structure

Who discovered the proton in the nucleus?

What happened first?

Who coined the term atom in 400 BC?

Did JJ Thomson's experimental findings support Dalton's atomic theory?

Isotopes have different numbers of...

Who discovered that atoms are mostly empty space?

The total number of protons and neutrons in the nucleus of an atom is called the...

Which number is not necessary in order to calculate atomic mass?

Elements are identified by their

Who discovered the atom was divisible and had subatomic particles?

This is the least massive of the subatomic particles, which also carries a negative charge.

The most abundant isotope of an element will have a mass closest to what # of that element?

The reference isotope set as a standard for AMUs is

Boron has 5 electrons and

This is a positively charged particle found in the nucleus.

Who stated that elements are made of indivisible spheres called atoms?

This is in the center of an atom and contains most of the atom's mass.

The force that holds the positively charged nucleus together is called the...

Atomic mass of H = 1.0079, what is the most abundant isotope?

The nucleus is positively charged.

This is a particle with no charge that exists in the nucleus of an atom.

Who discovered the neutron?

Who discovered the electron?

An electron is found in the nucleus.

Atomic # = 9, mass # = 19, # of electrons =

What device was used to discover the electron?

Who created the plum pudding model?

Famous experiment responsible for the discovery of the nucleus?

Mass # = 23, atomic # = 11, # neutrons =

Who discovered the nucleus?

# of neutrons = mass # -

The force that holds atoms together is called...