The atomic mass of an atom is mostly made up of the subatomic particles located in the _________ of the atom.

The smallest particle of an element that maintains the properties of that element is a/an

The atomic number of an atom is the number of _________ in the nucleus of that atom.

The atomic number is used to determine the _________ of the element in the Periodic Table.

Protons and neutrons have a similar mass and size. That mass is _______.

Electrons are significantly _________ in mass and size than protons and neutrons.

A particle that is smaller than atom, such as a proton, neutron, or electron is a ____________.

a negatively charged particle in the electron cloud surrounding the atomic nucleus is a/an

A positively charged particle within the atomic nucleus is a/an

A neutral particle with no electrical charge within the atomic nucleus is a/an

The nucleus is the ______________ charged center of an atom containing the protons and neutrons.

The nucleus of an atom is positively charged because:

The nucleus:

The negatively charged space that surrounds the atomic nucleus is the ____________.

The electron cloud:

An atom is mostly comprised of _____________________.

Valence electrons are located in the _________________.

The conceptual model in which the elements are organized according to their properties is the ______________________.

All matter is made up _____________.

The lightest element is ____________.

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