Atoms and sub atomic particles

Front

What particle of the atom uniquely identifies/determines an element?

Back

Number of Protons

Front

How did each model of the atom help to develop the atomic theory?

Back

Each model contributed to modify and update the theory.

Front

When an atom has the same number of protons and electrons, the atom is __________?

Back

neutral

Front

A subatomic particle that has a negative charge is called --

Back

an electron

Front

Each neutron has a _________________ charge.

Back

neutral

Front

What is the center of an atom called?

Back

The nucleus

Front

What are the three main subatomic particles?

Back

Protons, Neutrons, Electrons

Front

What charge do protons carry?

Back

Positive charge

Front

What is the mass of a neutron compared to a proton?

Back

Approximately the same

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.