Atomic Structure Introduction

​Atomic Structure Introduction

Atomic Structure and the Periodic Table

Definitions

Atomic Number: the number of protons in an atom.

Mass Number: the number of protons + neutrons in an atom.

Use the PhET simulation to build an atom with the following components:

3 protons
4 neutrons
3 electrons

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Multiple Choice

What is the atomic number of the atom you created?

• 3

• 4

• 6

• 7

Multiple Choice

The mass of the atom is

• 3 amu

• 4 amu

• 7 amu

• 11 amu

Multiple Choice

Which of the following particles determines the mass of the atom?

• protons only

• protons + neutrons

• electrons

• protons + electrons

Create an atom with the following:

3 protons
4 neutrons
2 electrons

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Multiple Choice

The charge of this atom is

• 0, it is neutral

• -1

• +1

• -2

Multiple Choice

Which subatomic particle changes with a charge?

• Neutron
• Electron
• Photon
• Proton

Multiple Choice

What is the net charge on oxygen with 8 protons and 8 electrons?

• 0

• +1

• -2

• +2

Multiple Choice

What is the net charge on oxygen with 8 protons and 10 electrons?

• 0

• +1

• -2

• +2

Isotope Notation

Isotope Notation

Create an atom with the following:

4 protons
4 neutrons
4 electrons

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Multiple Choice

Which of the following is the correct identify of the atom you created?

• Lithium +1

• Be-4

• Be-8

• Lithium-8

Create an atom with the following:

4 protons
5 neutrons
4 electrons

Multiple Choice

How did this addition of a neutron change the Beryllium?

• It doesn't change it

• It becomes Be-9

• It becomes Be-8 with a +1 charge