Atomic Theory Review 2020

The first atomic theory was proposed by ________.

The picture below depicts the cathode-ray tube experiment that led to the discovery of _____.

Why were some particles deflected in the gold foil experiment?

Who proposed the nuclear model of the atom?

Why do radioactive nuclei decay?

The law of conservation of mass was developed by _______.

Whose model of the atom is shown below?

The number of protons in the atom is the ____.

Why were some of the alpha particles in Rutherford's experiment able to pass through the foil?

According to Rutherford, where in the atom are electrons located?

The first person to suggest the idea of atoms was ________.

James Chadwick made which of the following contributions to the atomic theory?

Neutrons have a ________ charge and are found _________.

The smallest subatomic particle is the ______.

Atoms of the same element with different masses are called ____.

Which of the following points from Dalton's atomic theory is incorrect?

What is half-life?

One of the primary goals of ancient alchemists was to _______.

Mass number can be calculated by ____.

How many electrons are in a neutral sodium atom?

How many neutrons are in a zinc-65 atom?

The picture shown below represents which of the following concepts?

All isotopes of an element have the same ____.

Which of the following isotopes represents an atom that has 17 protons and 20 neutrons?

Electrons were discovered by _______.

Atoms have a _______ charge.

What is the atomic number of ²⁰⁷Pb?

What subatomic particle(s) are located in the nucleus?

The Greek word "atomos" means _______.

You started with 44 g of an element and there are 5.5 g left. How many half-lives have passed?