Question 1

If an atom has 43 electrons, 56 neutrons, and 43 protons, what is its approximate atomic mass? What is the name of this element?

Accepted Answer

A)  atomic mass, 137 amu; Barium
B)  atomic mass, 99 amu; Technetium
C)  atomic mass, 99 amu; Radon
D)  atomic mass 142 amu; Einsteinium

Question 2

The shell model presented in this book is not very accurate. Why then is it presented?

Accepted Answer

A)  It reminds us that the study of matter relates to the solar system.
B)  Most instructors are not good enough artists to duplicate the complicated artwork of true model on the chalk board for explanation purposes.
C)  The shell model is derived from classical physics, which is still the most widely accepted approach to understanding atomic theory.
D)  The shell model is simpler and easy to understand.

Question 3

What is the purpose of a spectroscope?

Accepted Answer

A)  It separates light into its different frequencies.
B)  It separates light into its different wavelengths.
C)  It segregates light by the different amounts of energy it contains.
D)  all of the above
E)  It is used to measure the length of spects.

Question 4

List the following elements in order of increasing ionization energy: Tin, Sn; Lead, Pb; Phosphorus, P; Arsenic, As.

Accepted Answer

A)  As 
B)  Pb 
C)  P 
D)  Sn < Pb < P < As

Question 5

Which of the following statements does not describe a proton?

Accepted Answer

A)  It orbits around the nucleus of an atom.
B)  It has a positive charge equivalent but opposite of an electron's.
C)  It is much more massive than an electron.
D)  It is a nucleon.
E)  It is attracted to negatively charged electrical plates.

Question 6

If an atom were the size of a baseball, its nucleus would be about the size of a(n) ________.

Accepted Answer

A)  walnut
B)  raisin
C)  flea
D)  atom

Exam 4: Subatomic Particles

If an atom were the size of a baseball, its nucleus would be about the size of a(n) ________.

Correct Answer
verified

What is the purpose of a spectroscope?

Correct Answer
verified

Which of the following statements does not describe a proton?

Correct Answer
verified

The shell model presented in this book is not very accurate. Why then is it presented?

Correct Answer
verified

If an atom has 43 electrons, 56 neutrons, and 43 protons, what is its approximate atomic mass? What is the name of this element?

Correct Answer
verified

List the following elements in order of increasing ionization energy: Tin, Sn; Lead, Pb; Phosphorus, P; Arsenic, As.

Correct Answer
verified

Exam 4: Subatomic Particles

If an atom were the size of a baseball, its nucleus would be about the size of a(n) ________.

Correct AnswerverifiedShow Answer

What is the purpose of a spectroscope?

Correct AnswerverifiedShow Answer

Which of the following statements does not describe a proton?

Correct AnswerverifiedShow Answer

The shell model presented in this book is not very accurate. Why then is it presented?

Correct AnswerverifiedShow Answer

If an atom has 43 electrons, 56 neutrons, and 43 protons, what is its approximate atomic mass? What is the name of this element?

Correct AnswerverifiedShow Answer

List the following elements in order of increasing ionization energy: Tin, Sn; Lead, Pb; Phosphorus, P; Arsenic, As.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified