QUIZ 5- Isotopes and Average Atomic Mass

In this Isotope notation, what does the red number 2 on the left, bottom corner represent?

• The electrical charge
• The atomic mass
• The number of electrons
• The number of protons

Tags

NGSS.MS-PS1-1

An isotope of Carbon is Carbon-14. What is different between this isotope and the information on the periodic table for Carbon?

• the atomic number 6
• the chemical symbol "C"
• the chemical name "Carbon"
• the atomic mass 12.011

Tags

NGSS.MS-PS1-1

The following Bohr model is an isotope of which element?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Based on the information in the isotope notation, how many neutrons does this isotope of Neon contain?

• 10 neutrons
• 11 neutrons
• 12 neutrons
• Cannot tell with this information

Tags

NGSS.MS-PS1-1

Which of the following Bohr model correctly matches the isotope symbol shown?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

How can we make another isotope of Beryllium?

• Add another proton
• Add another neutron
• Add another electron
• Add another level

Tags

NGSS.MS-PS1-1

Given this information, what is the mass of this isotope?

• 8 amu
• 10 amu
• 16 amu
• 18 amu

Tags

NGSS.MS-PS1-1

How do we calculate the average atomic mass of three different isotopes of an element?

• Add the three masses and divide by 3 then multiply by 100
• Divide the atomic mass on the periodic table by 3 then multiply by the percent abundance
• Multiply each atomic mass of the isotopes by their percent abundance written as a decimal then add
• Subtract each atomic mass of the isotope from the average atomic mass on the periodic table

Calculate the average, weighted atomic mass of Sulfur if 95.00% of Sulfur-32 atoms have a mass of 31.972 amu; 0.76% of Sulfur -33 atoms have a mass of 32.971 amu; and 4.22% of Sulfur-34 atoms have a mass of 33.967 amu. (Round to the hundredths place)

• 30.25 amu
• 31.36 amu
• 32.06 amu
• 32.10 amu

What is the average atomic mass of Neon, given that it has Ne-20 with a mass of 19.992 amu (90.51%), Ne-21 with a mass of 20.993 amu (0.27%), Ne-22 with a mass of 21.991 amu (9.22%). (Round to the hundredths place)

• 19.20 amu
• 20.18 amu
• 35.26 amu
• 45.21 amu