Atomic Theory

What is the difference between an atom in the ground state and an atom in an excited state?

The subatomic particle(s) found in the nucleus of an atom are

J.J Thompson's experiments provided evidence of

Who discovered the nucleus

What Scientist is credited with creating the first Atomic Theory?

Aluminum +3 has ________ protons; 13 neutrons; and _______ electrons

How do you calculate neutrons?

Valence electrons are...

Which of the following is ALWAYS true regarding atoms of two different elements?

In which way do isotopes of an element differ?

How many electrons are found in the 2nd level?

Suppose an atom has a mass number of 23. Which statement is true beyond any doubt?

All atoms are...

If an atom loses and electron it becomes...

An atom has an atomic number of 42 how many electrons does the atom have?

What can you assume has happened if an electron moves to a higher energy level?

The isotope Na-26 has how many neutrons

Who provided the first evidence of subatomic particles?

The atomic number of Sulfur is 16. How many subatomic partials does sulfur have?

What subatomic partial has a negative charge

How many neutrons does Krypton have? (Kr)

Calcium’s atomic number is 20. What does that tell us about a calcium atom?

What is unique about any given atom?

Which is true about oxygen with an atomic mass of 17 and oxygen with an atomic mass of 18.

Almost all the mass of an atom is located where?

J.J Thompson's named his model after what?

Electron emit light when...

Electrons in the first energy level...

Who concluded that electrons behave in energy levels?

The Atomic Number.....