Discovered the neutron. He concluded the nucleus also contains a particle that has equal mass to the proton. But unlike the proton, its electrically neutral.

Whose model suggested that negative particles were mixed in with positively charged material - like seeds in a watermelon?

What did the Dalton model of the atom describe it as?

What is the relative electrical charge of an electron?

According to the plum pudding model, what is the atom composed of?

Who discovered that the atom had an small, dense, positively charged center?

Made Daltons model invalid. Protons occupy a dense central region called the nucleus. Electrons orbit the nucleus much like planets orbiting the sun.

Discovered the electron using the cathode-ray tube. It is known as the plum pudding "chocolate chip cookie model"

Known for his Atomic Theory. This theory states that all matter is composed of extremely small particles.

Bohr's model of an atom is also called as _____.

What happens to the charge of an atom when it loses an electron?

A probable location of an electron around the nucleus in a quantum mechanical model is called a(n)_____.

In the Bohr model, how do electrons travel?

1. What element is represented in this Bohr Model?

What is the spectrum region for Balmer series?

What is n defined as in the Bohr's atomic model?

Positively charged subatomic particles located in the nucleus of an atom