CPC 3.3 How Atoms Differ

Multiple Choice

How are the elements arranged in the periodic table?

• By alphabetical order

• By increasing atomic number

• By date of discovery

• By size, smallest to biggest

Multiple Choice

What do the horizontal rows in the periodic table represent?

• Groups

• Periods

• Families

• Levels

Multiple Choice

What do the vertical columns in the periodic table represent?

• Periods

• Levels

• Groups or families

• Rows

Multiple Choice

What is the atomic number of an element?

• The number of electrons in an atom

• The number of protons in an atom

• The number of neutrons in an atom

• The total mass of an atom

Multiple Select

Which of these are commonly found on the periodic table?

• Chemical name

• Atomic number

• Chemical symbol

• Average atomic mass

• Number of neutrons

Multiple Choice

In a neutral atom, the atomic number is equal to the number of which particles?

• Protons and electrons

• Neutrons and electrons

• Protons and neutrons

• Neutrons and molecules

Multiple Select

If an element has an atomic number of 6, which of these must be true?

• It has 6

  protons

• It has 6

  electrons

• It has 6

  neutrons

• It has an atomic mass of 6

Multiple Select

Which of these is true about an atom of Rutherfordium?

(assume atoms are neutral unless told otherwise)

• It has 104 electrons

• It has 104 protons

• It has 267 protons

• It has 267 neutrons

• It's not a real element, Mr. Oliver made it up

Dropdown

Use the portion of the periodic table provided to fill in the table.​ ​

Element: Pb

Atomic Number: 82

Number of Protons: ​

Select answer

Number of Electrons: ​

Select answer

Fill in the Blanks

Fill in the Blanks

Dropdown

Use the portion of the periodic table provided to fill in the table.​ ​

Element: Zn

Atomic Number: ​

Select answer

Number of Protons: ​ ​

Select answer

Number of Electrons: ​ 30

Dropdown

Use the portion of the periodic table provided to fill in the tablle​ ​

Element: O

Atomic Number: ​ ​

Select answer

Number of Protons: ​ ​ 8

Number of Electrons: ​​

Select answer

Multiple Choice

What is the term for atoms with the same number of protons but different numbers of neutrons?

• Ions

• Isotopes

• Molecules

• Compounds

Multiple Choice

What do all atoms of an element have in common?

• Same number of neutrons

• Same number of protons and electrons

• Same mass number

• Same atomic weight

Multiple Choice

What does the mass number of an element represent?

• The number of protons only

• The number of electrons only

• The sum of protons and neutrons

• The number of neutrons only

Multiple Choice

Which of the following is true about isotopes?

• They have different numbers of protons

• They have different numbers of electrons

• They have different mass numbers

• They have different atomic numbers

Fill in the Blanks

Multiple Choice

Which of the following isotopes of potassium has 22 neutrons?

• Potassium-39

• Potassium-40

• Potassium-41

• Potassium-42

Fill in the Blanks

Multiple Select

What remains constant in different isotopes of the same element?

(Choose 2)

• Number of neutrons

• Number of electrons

• Number of protons

• Mass number

Dropdown

A chemistry laboratory has analyzed the composition of isotopes of several elements. The data is given in the table. Complete the information about the neon isotope:

Number of Protons: ​

Select answer

​

Number of Electrons: ​​

Select answer

Number of Neutrons: ​

Select answer

Name: ​

Select answer

Multiple Choice

What is one atomic mass unit (amu) defined as?

• One-tenth the mass of a carbon-12 atom

• One-twelfth the mass of a carbon-12 atom

• One-fourth the mass of a carbon-12 atom

• One-half the mass of a carbon-12 atom

Multiple Choice

What is the atomic mass of an element?

• The sum of the masses of all isotopes

• The mass of the most abundant isotope

• The weighted average mass of the isotopes

• The weighted mass of the heaviest isotope

​https://www.youtube.com/watch?v=xirPkCI1sMA

​The video of this being worked out is here if you want to check it out: https://app.screencastify.com/v3/watch/c3PTIFFWXnIVh8IW8UfC

Drag and Drop

What is the mass contribution of the ⁶X Isotope (top row)?

mass contribution = (mass)(percent abundance)

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What is the mass contribution of the ⁷X Isotope?

mass contribution = (mass)(percent abundance)

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Mass contributions of these isotopes:

⁶X = 0.456 ⁷X = 6.483

What is the atomic mass of X?

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Multiple Choice

What does the atomic number of an element refer to? 

• the number of neutrons in an atom

• the mass number of an atom

• the number of protons in an atom

• the atomic mass of an element

Multiple Choice

Which term identifies each isotope of an element and is the sum of the number of protons and neutrons in the nucleus? 

• atomic number

• atomic mass

• mass number

• atomic mass unit

  (amu)

Multiple Choice

In a neutral atom, what is the number of electrons equal to?

• mass number

• atomic mass

• atomic number

• neutron number

Multiple Choice

Which of the following is true? 

• An atom’s mass depends mainly on the number of electrons it contains.

• The atomic mass of an element is the weighted average of the atomic numbers of an isotope.

• A mass of 1 amu is nearly equal to the mass of a single electron.

• One atomic mass unit (amu) is one-twelfth the mass of a carbon-12 atom.