Unit 2 Review

List the atomic theorists in chronological order

• Rutherford, Dalton, Thomson, Bohr

• Dalton, Thomson, Rutherford, Bohr

• Thomson, Dalton, Rutherford, Bohr

• Bohr, Rutherford, Thomson, Dalton

The isotope of Carbon C-13 has how many protons, neutrons & electrons (in that order)

• 13, 6, 13

• 7, 6, 7

• 6, 7, 6

• 6, 13, 6

How many electrons does N-17 have?

• 17

• 7

• 10

• 14

Calculate the average atomic mass of Boron if 81% is B-11 and 19% is B-10

• 10.0

• 10.5

• 10.8

• 10.9

What is the most abundant isotope of carbon? (Average atomic mass 12.011)

• C-12

• C-13

• C-14

• C-16

What happens if N-14 gains a proton?

• It becomes N-15

• It becomes O-15

• It becomes C-15

• It becomes O-16

An element has the following natural abundances and isotopic masses: 90.92% abundance with 19.99 amu, 0.26% abundance with 20.99 amu, and 8.82% abundance with 21.99 amu. Calculate the average atomic mass of this element.

• 20.99 amu

• 21.00 amu

• 20.16 amu

• 21.16 amu

What element has 11 protons and an average atomic mass of 22.99?

• Na

• Potassium

• N

• Magnesium

This model of an atom of Xenon was created by:

• Dalton

• Thomson

• Rutherford

• Bohr

Which atom has a higher mass: C-14 or N-14?

• C-14

• N-14

• They have the same mass