Ch. 7 Test

Front

What is a neutron?

Back

A subatomic particle with no charge, a mass of 1 amu, located in the nucleus of an atom.

Front

What does the pH scale measure?

Back

The pH scale measures the acidity or basicity of a solution, ranging from 0 to 14.

Front

What is the 'Plum Pudding Model' of the atom?

Back

A model developed by J.J. Thompson that depicts electrons floating freely in a positively charged space.

Front

What is the charge of a neutron?

Back

A neutron has no charge.

Front

What is the mass of a neutron?

Back

A neutron has a mass of approximately 1 atomic mass unit (amu).

Front

What happens to atomic theories over time?

Back

Atomic theories have changed as new discoveries have been made.

Front

What is the range of the pH scale?

Back

The pH scale ranges from 0 to 14.

Front

What particle is found in the nucleus of an atom and has a positive charge?

Back

A proton.

Front

What is the difference between an electron and a neutron?

Back

An electron has a negative charge and is found outside the nucleus, while a neutron has no charge and is found in the nucleus.

Front

What is the significance of J.J. Thompson's discovery?

Back

He discovered electrons, which are smaller than atoms, leading to new models of atomic structure.