Introduction to Atom

8th grade ATOMS

by John Toje

Atoms

What Are They?

What Are They Made Of?

How Do We Study Them?

Atoms and Molecules Part 1

The tiny particles that make up elements are called atoms. An atom is the smallest unit of an element that retains or keeps the properties of that element. For example, the atoms that make up oxygen can never be changed.

What are atoms made of?

Atoms are made of Protons and Neutrons, located in the Nucleus, and Electrons around the outside of the nucleus.

Multiple Select

What particles are atoms made of? (Check ALL that apply:)

• Protons

• Neutrons

• Electrons

• Nucleus

Multiple Select

What particles are in the nucleus?

• Protons

• Neutrons

• Electrons

• Nucleus

Multiple Select

Which particle is outside the nucleus?

• Protons

• Neutrons

• Electrons

• Nucleus

Protons, Neutrons, and Electrons:

• Protons and neutrons have mass.

• Electrons don't have mass.

Multiple Select

Which two particles have mass?

• Protons

• Neutrons

• Electrons

• Nucleus

Particle Charges:

Protons are positively charged.

Neutrons are neutrally charged.

Electrons are negatively charged.

Multiple Choice

Protons are:

• Positive

• Neutral

• Negative

Multiple Choice

Neutrons are:

• Positive

• Neutral

• Negative

Multiple Choice

Electrons are:

• Positive

• Neutral

• Negative

Atoms and Molecules Part 1

The inside of an atom contains three different kinds of particles as well. They are called protons, neutrons, and electrons. Surprisingly, atoms are not solid, they are mostly empty space. There is a tiny, very dense body in the center of an atom called the nucleus. Inside the nucleus are the protons and neutrons. The electrons are in the space outside the nucleus.

Multiple Choice

The smallest unit of an element that retains or keeps the properties of that element is called

• A molecule

• An atom

• A proton

• A neutron

What Are Atoms? (Video)

• Make Up All Matter: Living and Nonliving; Solids, Liquids and Gases

• Microscopic - Around 40 Quintillion (40,000,000,000,000,000,000) Atoms in a Grain of Sand

Multiple Choice

Everything but air is made of atoms.

• True

• False

Multiple Choice

About how many atoms make up one grain of sand?

• 40 thousand

• 40 million

• 40 trillion

• 40 quintillion

Subatomic Particle (Video)

Proton

• Positive Electric Charge

• In the Nucleus (Center of Atom)

• Number of Protons in an Atom Determines the Element It Is

Subatomic Particle

Neutron

• Has No Charge - Neutral

• In the Center of the Atom (Nucleus)

• Hold the Nucleus Together - Strong Force

Multiple Choice

What allows neutrons to hold the protons together in the nucleus?

• solar force

• electric force

• strong force

Electrons

• Have a negative electric charge

• Whirl around the nucleus at about the speed of light, leaving an electron cloud around the atom "blurry"

• Responsible for reactivity and electricity

Multiple Choice

Because electrons move so quickly around the nucleus, it make atoms look _____________ in a microscope.

• clear

• blurry

• completely dark

Multiple Choice

Protons have a _________________ charge.

• negative

• surface

• positive

• neutral

Multiple Choice

Electrons have a ______________ charge.

• neutral

• negative

• positive

• surface

Multiple Choice

There are the same number of _________ in an atom.

• protons and electrons

• electrons and neutrons

• protons and neutrons

• protons and particles

Multiple Choice

The amount of _________ an atom has determines the name of the element.

• protons

• neutrons

• particles

• elements

Multiple Choice

There are the same number of _________ in an atom.

• protons and electrons

• electrons and neutrons

• protons and neutrons

• protons and particles

Multiple Choice

The amount of _________ an atom has determines the name of the element.

• protons

• neutrons

• particles

• elements

Multiple Choice

Neutrons have a ______________ charge.

• neutral

• surface

• positive

• negative

Multiple Choice

The particles that orbit the nucleus of an atom are called ____________.

• nuclei

• protons

• neutrons

• electrons

Multiple Choice

The nucleus of an atom contains the ____.

• protons and particles

• protons and neutrons

• electrons and neutrons

• protons and electrons

Multiple Choice

Atom is the common name for the ______________________________.

• elements on the Periodic Table

• tiny particles of matter that can't be further divided and remain the same substance

• two or more elements that have combined chemically

• substances that have mass and take up space

Multiple Choice

Protons and neutrons are found in the center of the atom called the:

• nucleus

• neutron

• shell

• cell

Multiple Choice

The smallest piece of an element:

• quark

• electron

• shell

• atom

Multiple Choice

True or False? Neutrons have a negative charge

• True

• False

Multiple Choice

an atom with atomic number 6 would have how many protons 

• 6

• 12

• 3

• cannot be determined 

Multiple Choice

What is the atomic number for an element with three protons?

• 2

• 1

• 3

• 6

Multiple Choice

What is the overall charge of the NUCLEUS?

• +1

• 0

• -1

Electron Cloud

• if the electrons are the only particles found in the electron cloud, the cloud will have an overall charge of -1

•