Atoms and sub atomic particles

Front

What particle provides the positive charge for an atom?

Back

Proton

Front

Which particle is much smaller than the other particles and negatively charged?

Back

Electron

Front

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

Back

Number of Protons

Front

How many electrons are needed to make an atom with 25 protons and 30 neutrons neutral?

Back

25

Front

The atomic theory has been updated and ______ over time.

Back

modified

Front

What is the charge of a proton?

Back

Positive

Front

What is the charge of a neutron?

Back

Neutral

Front

What is the charge of an electron?

Back

Negative

Front

What is the nucleus of an atom composed of?

Back

Protons and Neutrons

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.