UNIT 3 review - Atomic Structure (Part 1)

There are three _____ found in various numbers that make up atoms of all elements on the periodic table.

• ion

• atomic mass

• subatomic particles

• isotopes

____ (p+) and ____ (n⁰) are located in the nucleus of an atom.

• Atomic mass, mass number

• neutrons, electrons

• electrons, protons

• protons, neutrons

Where are the protons (p+) and neutrons (n^o) are referred to as _____?

• valence

• ion

• atomic mass

• nucleons

Atoms of the same element with different masses are referred to as ______ ? C-14 and C-12 are examples

• ions

• isotopes

• valence

• ground

Isotopes have different numbers of ______. C-14 and C-12 are examples.

• electrons

• protons

• valence

• neutrons

An ____ is a particle that has a positive or a negative charge due to the loss or the gain of one or more electrons (e-).

• ion

• isotope

• valence

• electron

An ion is a particle that has a positive or negative charge due to the loss or the gain of one or more _____.

• protons

• electrons

• neutrons

• atomic mass

The _____ electrons are those found in the outermost occupied energy level. You can determine this by looking at the last number of the electron configuration.

• atomic mass

• mass number

• electrons

• valence

A calculated weighted average of all the natural isotopes of an element is the _____. It is found in the upper left corner of each elements box of the periodic table.

• mass number

• atomic mass

• subatomic particles

• valence

The atomic mass rounded to the nearest whole number is called the _____. For the element helium it would be 4.

• atomic mass

• mass number

• valence

• electrons