Question 1

A fictional element has two naturally occurring isotopes with the natural abundances shown here:  Which statement is TRUE for this element?

Accepted Answer

A)  The atomic mass would be 16.
B)  The atomic mass would be less than 16.
C)  The atomic mass would be 18.
D)  The atomic mass would be more than 18.
E)  The atomic mass would be 17.

Question 2

A fictional element named Nivadium is found to have three naturally occurring isotopes with the natural abundances shown here:  The calculated atomic mass of Nivadium is:

Accepted Answer

A)  7.61 amu
B)  22.83 amu
C)  23.18 amu
D)  69.55 amu
E)  none of the above

Question 3

What is the atomic symbol for tin?

Accepted Answer

A)  Sn
B)  Ti
C)  Tn
D)  Si
E)  none of the above

Question 4

If two atoms each contain different numbers of protons,the atoms must be from different elements.

Accepted Answer

A) True 
 B)False

Question 5

How many neutrons are present in C-14?

Accepted Answer

A)  14
B)  12
C)  6
D)  8
E)  none of the above

Question 6

The plum pudding model proposed that negatively charged electrons were held in a sphere of positive charge.

Accepted Answer

A) True 
 B)False

Question 7

Isotopes are:

Accepted Answer

A)  atoms of the same element that have different number of neutrons.
B)  atoms of the same element that have different number of protons.
C)  atoms of the same element that have different number of electrons.
D)  atoms of the same element that have the same number of neutrons.
E)  none of the above

Question 8

Protons and electrons each have a mass of 1 amu.

Accepted Answer

A) True 
 B)False

Question 9

What is the charge on an ion that has an atomic number of 24 and contains 22  ?

Accepted Answer

A)  2+
B)  2-
C)  1+
D)  1-
E)  none of the above

Question 10

The atom is the fundamental building block of everything we hear,feel,see,and experience.

Accepted Answer

A) True 
 B)False

Question 11

How many protons and neutrons are in Cl-37?

Accepted Answer

A)  20 protons,17 neutrons
B)  17 protons,37 neutrons
C)  17 protons,20 neutrons
D)  37 protons,17 neutrons
E)  none of the above

Question 12

An atom is the smallest identifiable unit of a compound.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is NOT a correct name,symbol combination?

Accepted Answer

A)  beryllium,Be
B)  magnesium,Mg
C)  iron,I
D)  manganese,Mn
E)  silicon,Si

Question 14

Which of the following is NOT a correct name,symbol combination?

Accepted Answer

A)  calcium,Ca
B)  gold,Au
C)  manganese,Mn
D)  chromium,Cr
E)  potassium,P

Question 15

The atomic mass of individual atoms of an element may vary.

Accepted Answer

A) True 
 B)False

Question 16

When an atom loses an electron,the resulting particle is called:

Accepted Answer

A)  a proton.
B)  an anion.
C)  a cation.
D)  an isotope.
E)  none of the above

Question 17

All carbon atoms have exactly 6 protons.

Accepted Answer

A) True 
 B)False

Question 18

In the modern periodic table,elements are listed in order of increasing atomic number rather than increasing relative mass.

Accepted Answer

A) True 
 B)False

Question 19

Which statement reflects the results of Rutherford's gold foil experiments?

Accepted Answer

A)  Almost all of the alpha particles were deflected back in the direction from which they came.
B)  Almost all of the alpha particles sputtered gold atoms off of the surface of the foil.
C)  Almost all of the alpha particles were deflected while passing through the foil.
D)  Almost all of the alpha particles passed directly through the foil.
E)  none of the above

Question 20

Which statement below accurately describes the contributions of Thomson?

Accepted Answer

A)  ancient Greek philosopher who proposed that matter was continuous
B)  created the modern periodic table
C)  proposed the modern Atomic Theory
D)  discovered the existence of electrons
E)  none of the above

Exam 4: Atoms and Elements

An atom is the smallest identifiable unit of a compound.

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Protons and electrons each have a mass of 1 amu.

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When an atom loses an electron,the resulting particle is called:

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If two atoms each contain different numbers of protons,the atoms must be from different elements.

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In the modern periodic table,elements are listed in order of increasing atomic number rather than increasing relative mass.

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What is the atomic symbol for tin?

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How many neutrons are present in C-14?

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The atomic mass of individual atoms of an element may vary.

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The plum pudding model proposed that negatively charged electrons were held in a sphere of positive charge.

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Isotopes are:

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Which of the following is NOT a correct name,symbol combination?

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Which statement below accurately describes the contributions of Thomson?

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What is the charge on an ion that has an atomic number of 24 and contains 22 ?

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Which statement reflects the results of Rutherford's gold foil experiments?

Correct AnswerverifiedShow Answer

A fictional element named Nivadium is found to have three naturally occurring isotopes with the natural abundances shown here: The calculated atomic mass of Nivadium is:

Correct AnswerverifiedShow Answer

The atom is the fundamental building block of everything we hear,feel,see,and experience.

Correct AnswerverifiedShow Answer

All carbon atoms have exactly 6 protons.

Correct AnswerverifiedShow Answer

Which of the following is NOT a correct name,symbol combination?

Correct AnswerverifiedShow Answer

How many protons and neutrons are in Cl-37?

Correct AnswerverifiedShow Answer

A fictional element has two naturally occurring isotopes with the natural abundances shown here: Which statement is TRUE for this element?

Correct AnswerverifiedShow Answer

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