Atomic Theory 21/22

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

Who developed the "planetary" model of the atom?

Thomson is credited for discovering the

Why were some particles deflected in the experiment shown here?

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

Which subatomic particle has a positive charge and is located in the nucleus?

The Greek word "atomos" means _______.

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

Rutherford, concluded that the atom is ?

Isotopes are atoms of the same element that have different numbers of ____.

Which of the following was accomplished by Ernest Rutherford?

The negatively charged subatomic particle is the ______.

The number of protons in the atom is the ____.

The electron cloud model states that electrons do not have a fixed orbit, but instead move in a wave-like

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

How did Bohr modify Rutherford's model of the atom?

Atoms that lose electrons become ____.

The person whose model of the atom is shown below discovered the nucleus?

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

Neutrons have a ________ charge and are found _________.

What are the fundamental building blocks of all matter?

Whose model of the atom is shown below?

The total number of protons and neutrons is represented by which number?

Atoms have a _______ charge.

What happens on the first day of fall?

Which scientist thought atoms were simply solid spheres?

Mass number can be calculated by ____.

Anions are ____.

The first atomic theory was proposed by ________.

Electrons were discovered by _______.