Atomic Structure

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Objectives

After this video lesson, you will...

1. identify the subatomic particles

2. answer questions about the atomic structure correctly

Multiple Choice

What number indicates the nucleus?

• 1
• 2
• 3
• 4

Multiple Choice

Where is most of the mass in an atom located?

• in the nucleus
• in the protons
• in the neutrons
• in the electrons

Multiple Choice

The particles with no charge in an atom are the _______.

• electrons
• neutrons
• protons
• protons and neutrons

Multiple Choice

 What is the mass number of this element?

• 5
• 27
• 32
• 59

Multiple Choice

The positively charged particles of an atom are the ________.

• electrons
• protons
• neutrons
• protons & neutrons

Multiple Choice

What are atoms?

• Tiny particles that make up everything

• Large structures found in nature

• Building blocks of a cell

• Elements found in the periodic table

Multiple Choice

Which formula is used to calculate the atomic mass of an element?

• Atomic number + protons

• Mass number - protons

• Neutrons - protons

• Protons + neutrons

Multiple Choice

The atomic number of an element is 8 and it has 9 neutrons. What is the atomic mass of this element?

• 1

• 8

• 9

• 17

Multiple Choice

What is the atomic mass of an element that has 15 protons and 18 neutrons?

• 15

• 18

• 33

• 47

Multiple Choice

An element has an atomic mass of 40. It has 20 protons. How many neutrons does it have?

• 10

• 20

• 40

• 60

Multiple Choice

What is the atomic mass of an element that has 26 protons and 30 neutrons?

• 4

• 26

• 30

• 56

Multiple Choice

If an atom loses one or more of its outer electrons, what happens to its overall charge?

• it becomes negative

• it becomes positive

• stays the same

• depends on the ion

Multiple Choice

How would you describe the size of an atom?

• Atoms are incredibly large and easy to see

• Atoms are so small that they are difficult to comprehend

• Atoms are slightly smaller than the human body

• Atoms are larger than planets

Multiple Choice

What is the nucleus of an atom made up of?

• Electrons

• Protons and neutrons

• Positively charged particles

• Negatively charged particles

Multiple Choice

Which statement about charges in atoms is true?

• Protons have a positive charge, and electrons have a neutral charge.

• Neutrons have a negative charge, and electrons have a positive charge.

• Protons have a positive charge, and electrons have a negative charge.

• Neutrons have a negative charge, and electrons have a neutral charge.

Multiple Choice

Why don't electrons fly away from the nucleus of an atom?

• Electrons are attracted to the positively charged protons.

• Electrons have a neutral charge, so they don't interact with protons.

• Electrons are repelled by the negatively charged protons.

• Electrons are too heavy to move away from the nucleus.

Multiple Choice

What is the weight of a proton or neutron?

• 1 atomic mass unit (amu)

• 0.0005 amu

• 0.001 amu

• 0.1 amu

Multiple Choice

What is a more convenient way to measure the mass of a proton or neutron?

• Grams

• Kilograms

• Atomic mass unit (amu)

• Pounds