Fall Semester Exam Review 2021

Write 0.00470 in scientific notation:

• 4.70 x 10^-2

• 4.70 x 10^-3

• 4.70 x 10²

• 4.7 x 10^-3

A sample of benzene has a mass of 48 g and a density of 8.7 g/mL. What is its volume?

• 5.5 mL

• 418 mL

• 0.18 mL

• 1.1 mL

Which diagram, X, Y or Z, represents a mixture of elements A and B?

• X only

• Z only

• X and Y

• X and Z

The particle diagram below shows which of the following?

• Compound

• Mixture of elements

• Mixture of compounds

• Mixture of element and compounds

The particle diagram below shows which of the following?

• Compound

• Mixture of elements

• Mixture of compounds

• Mixture of elements and compounds

Tags

NGSS.MS-PS1-1

A hypothetical element consists of 3 isotopes with the following masses and natural abundances. What is the average atomic mass?

• 39.9 amu

• 39.2 amu

• 40.1 amu

• 40.9 amu

One isotope has a mass of 38.0 amu and accounts for 67% of all atoms of this element. The other isotope has a mass of 36.0 amu and accounts for 33.0%. What is the average atomic mass of this isotope?

• 36.7 amu

• 37.0 amu

• 37.3 amu

• 38.0 amu

Which element has the largest atomic radius?

• Hydrogen

• Magnesium

• Helium

• Calcium

Which element is most electronegative?

• Cs

• N

• Ca

• Al

Tags

NGSS.HS-PS1-1

Which elements will have similar properties to Calcium?

• Barium

• Potassium

• Scandium

• Sodium

Tags

NGSS.HS-PS1-1