Exploring Atomic Structure

The smallest unit of an element is called a ___.

In an atom, protons are found in the ___.

The charge of a neutron is ___.

The atomic number of an element is determined by the number of ___.

Electrons are located in ___ around the nucleus.

The mass number of an atom is the sum of ___ and ___ in the nucleus.

Isotopes of an element have the same number of ___ but different numbers of ___.

Which particle has a positive charge? (a) Electron (b) Proton (c) Neutron

What is the relative mass of an electron? (a) 1 (b) 0.0005 (c) 1.007

The nucleus of an atom contains ___ and ___.