Atoms & Elements - Engage & Explore

Atoms & Elements

Engage and Explore ​

Francium is the rarest element on Earth. Fr - atomic number 87

Tungsten is the hardest metal known to man. It is used for heavy-duty industries such as space travel.
W - atomic number 74

​also known as Wolfram

​Science Fun Fact

​Atomic - means pertaining to atoms
Mass - Latin massa - meaning material or matter

This number is used to calculate the number of neutrons in an atom.

​​Atomic Mass

​Atomic - means pertaining to atoms

This number represents the number of protons in the nucleus of the atom. It is UNIQUE!

Atomic Number

​It comes from Latin elementum - meaning the most basic form or rudiment.

An element cannot be broken down into simpler substances.

​​Element

​VOCABULARY

Matter makes up EVERYTHING

The atomic number is usually located in the top left corner of the box.
Example: 20

Atomic Number

​The atomic mass is the number usually at the bottom of the box.

Example: 40

Atomic Mass

Parts of an Atom

Look at the Atomic Number and that is the number of protons. The number of protons NEVER changes.
P = 19

​​Protons

There are the same number of electrons as protons in a neutral elemental atom.
E = 19

Electrons

To determine the number of neutrons, take the atomic mass and subtract the atomic number
39 - 19 = 20 Neutrons

Neutrons

Draw

How many protons are in an atom of Arsenic?

Draw

How many electrons are in an atom of Arsenic?

Draw

How many neutrons are in one atom of Arsenic?

Multiple Choice

How many protons does Potassium have?

• 19

• 39

• 20

• None of the above

Multiple Choice

How many electrons does Potassium have?

• 19

• 39

• 20

• 100

Draw

How many neutrons does Potassium have?

Multiple Choice

How many protons are in an atom of oxygen?

• 8

• 16

• 24

• 32

Draw

How many electrons are in an atom of oxygen?

Draw

How many neutrons are in an atom of oxygen?

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Draw

How are you feeling about finding the correct number of protons, neutrons and electrons for an atom?

Reorder

Which part of finding the particles in an atom are you most confident about? Rank from 1 being strongest and 3 being weakest.

• Protons

• Electrons

• Neutrons

1

2

3

• 1
• 2
• 3