Chapter Three General Chemistry 2024

Front

Which scientist proposed that the atom is a solid sphere?

Back

John Dalton proposed that the atom is a solid sphere, forming the basis of Dalton's Atomic Theory.

Front

In Dalton's Atomic Theory, what are the indivisible units that make up all elements?

Back

Atoms are the indivisible units that make up all elements according to Dalton's Atomic Theory.

Front

What subatomic particle did James Chadwick discover?

Back

James Chadwick discovered the neutron.

Front

What varies between isotopes of an element?

Back

Isotopes of an element vary in the number of neutrons and atomic mass.

Front

What is the charge of a neutron?

Back

A neutron has no charge.

Front

What is the atomic theory?

Back

The atomic theory is a scientific theory that states that matter is composed of discrete units called atoms.

Front

Who discovered the electron?

Back

J.J. Thomson discovered the electron.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons.