Introduction to Atoms

Introduction to Atoms

What is an atom?

Vocabulary term: Atom

• Atoms are the smallest part of an element

• They are considered the basic building blocks of life

What is an atom?

Parts of the atom

• Protons

• Neutrons

• Electrons

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are the basic building block of life

What are subatomic particles?

​Protons

• Protons are positively charged particles

• The identity of an element is determined by the number of protons in the element

What are subatomic particles?

Three subatomic particles

• Protons

• Neutrons

• Electrons

What are subatomic particles?

Neutrons

• Particles with NO CHARGE

• Contributes to the mass of the atom

• Provide stability to the atom

What are subatomic particles?

Electrons

• Negatively charged particles

• Surround the nucleus

Multiple Choice

Which of the following is NOT a subatomic particle?

• Proton

• Neutron

• Electron

• Nucleus

Multiple Choice

Which of the following is a POSITIVELY charged subatomic particle?

• Proton
• Photon
• Electron
• Neutron

Multiple Choice

Which of the following is a NEGATIVELY charged subatomic particle?

• Neutron
• Proton
• Electron
• Positron

Multiple Choice

Which of the following has a NEUTRAL charge?

• Positron
• Electron
• Neutron
• Proton

Protons and neutrons make up the atom's nucleus, which is located in the center of the atom

Electrons surround the nucleus.

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Locations of Subatomic Particles

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Protons and neutrons make up the atom's

, which is located in the center of the atom

Relationship of Subatomic Particles

Nucleus

• Protons and neutrons are bound in a tiny nucleus.

• The nucleus is located in the center of the atom

• The electrons move in the space around the nucleus.

Relationship of Subatomic Particles

Mass

• Protons and neutrons have about the same mass

• An electron is much smaller and lighter than a proton or a neutron.

Relationship of Subatomic Particles

The WHOLE Atom

• Differences in these particles make new kinds of structures, which contribute to their function, stability, and location on the periodic table

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The center of the atom is called the

.

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surround the atom's nucleus.

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are smaller and lighter than protons and neutrons.