Atom Worksheets

The word "atom" is derived from a Greek word for "uncuttable". Atoms are thought to be the smallest particle of a single element. There are smaller parts to an atom, but the makeup of an atom determines the properties of an element. It is pretty cool because how we mix up atoms up or together can make just about anything in the universe. You find three simple sub-atomic particles in each atom. In the center (nucleus) of each atom you will find neutrons and protons. Together they provide almost all of the mass for the element. Protons have a positive charge and neutrons have no charge. Spinning around the nucleus you will find electrons. They have a negative charge and provide very little mass to the overall element.

We first help students identify the basic parts of the atom and then work on how electron configuration affects the chemical nature of substances.

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Atoms and Molecules

Which of the following terms refers to the smallest part of a compound that has all the properties of that compound?

Anatomy of an Atom

Every atom (except the hydronium ion) has two main components, a NUCLEUS with PROTONS and NEUTRONS and one or more ORBITS (or SHELLS) that contain one or more electrons.

An atom is composed of protons, neutrons, and electrons. The protons and neutrons are found in the nucleus of the atom. The electrons are found in the electron cloud, which is an area that surrounds the nucleus.

Atomic Structure Practice Sheet 1

What is the mass number, symbol, and charge of an ion that contains 35 protons, 45 neutrons and 36 electrons?

Atomic Structure Practice Sheet 2

Write the complete chemical symbol for the ion with 82 protons and 80 electrons.

Atomic Structure Quiz

Complete this here chart for us.

Electron Configuration

Write the complete electron configuration for each of the following elements.

Electron Configuration Practice Sheet 1

Identify the element that corresponds to each of the following electron configurations?

Electron Orbital Diagrams

Draw orbital diagrams for the following atoms.

Electron Configuration Review Sheet

For each atom complete the information requested.

Valence Electrons

The electrons found in the outer most energy level of an atom are collectively referred to as valence electrons.

Lewis Dot Diagrams

Lewis Dot Diagrams are used to indicate the number of valence electrons for an atom.

Electron Configuration Review

Given an element, like Magnesium (Atomic Number 12, Mass Number 24), please provide all the following information for this element.

Electron Configuration Quiz: Form A

For identified element identify the ground state electron configuration, orbital diagram, Lewis dot diagram, and number of valence.

Identifying Compounds, Elements, Mixtures through Common Names

Place a check in the correct box to indicate the classification of each form of matter.

Identifying Compounds, Elements, Mixtures through Chemical Symbols

Place a check in the correct box to indicate the classification of each form of matter.

Nuclear Chemistry: Identifying Forms of Radiation

Place a check to identify the form of radiation demonstrated by each reaction below.

Nuclear Chemistry: Predicting Nuclear Decay Part 1

Predict the products of the following nuclear reactions.

Nuclear Chemistry: Predicting Nuclear Decay Part 2

What is going on with these nuclear reactions?

Nuclear Chemistry: Half-life

Radioactive substances decay at a constant rate. There are a number of unstable nuclei that decay in a given time. The time that it takes for half of the atoms in a given sample of an element to decay is termed the half-life.

Nuclear Chemistry Review Quiz: Form A

For questions 1 and 2 predict the missing reactant or product and identify the form of radiation demonstrated in each problem.

Nuclear Chemistry Quiz Part 2

For an atom of each element below write the electron configuration, orbital diagram, total number of valence electrons, and Lewis dot structure.

Question the name of Nuclear Chem.

Indicate if the item presented is an element, compound, or mixture.

Nuclear Chem. Part D

A 75 gram sample of a radioisotope decayed to 9.375 grams in 66 years. What is the half-life?

Unit Test: Form B

Identify the element that corresponds to each of the following electron configurations.

Unit Test Part B

Lewis Dot diagram, total number of valence electrons, and Lewis dot structure.

Part C Unit Test

Indicate if the item presented is an element, compound, or mixture.

Part D

Indicate if the item presented is an element, compound, or mixture.

Parts of a 3-Dimensional Atom

This may look a bit different than others.

Parts of a 2-Dimensional Atom

Charge it all up.

Model to Formula

Using the model key for each element, write the chemical formula for each molecule.

Formula to Model

Using the model key for each element, draw the model of each molecule.

Periodic Table of Elements Fill in

What is missing in here?

PT Fill in Part 2

Find those different elements and parts.

Element Fills

The element you want to see.

Anatomy of an Atom

The number of protons is the atomic number and the mass number is the sum of the protons and neutrons. The electrons in a neutral atom equal the number of protons.

The Bohr Model

Bohr models (or Bohr diagram) are diagrams that show the number of protons and neutrons in the nucleus and the electrons in each electron energy level around it.

Atoms in a Molecule

Provide the number of atoms in each molecule of the substances represented by the chemical formulas below.