Question 1

Which of the following is a trace element required in the human diet?

Accepted Answer

A)  Lead 
B)  Sodium 
C)  Potassium 
D)  Sulfur 
E)  Carbon

Question 2

Physical change is a process by which matter changes from one physical state to another.

Accepted Answer

A) True 
 B)False

Question 3

A nanometer is equal to _____ meters.

Accepted Answer

A)  106 
B)  10-6 
C)  109 
D)  10-8 
E)  10-9

Question 4

_____, by definition are measurements which consist of both a number and a unit.

Accepted Answer

A)  Null hypotheses 
B)  Results 
C)  Qualitative observations 
D)  Alternate hypotheses 
E)  Quantitative observations

Question 5

What is amplification? How do elements present in miniscule amounts in the body bring about large changes in a person's health?

Accepted Answer

The answer of What is amplification? How do elements present...

Question 6

α rays are made of particles having the higher mass-to-charge ratio and subsequently have the least penetrative capability.

Accepted Answer

A) True 
 B)False

Question 7

Explain how scientists use the scientific method to answer questions.

Accepted Answer

The answer of Explain how scientists use the scientific method...

Question 8

Write a note on alkali metals and their applications.

Accepted Answer

The answer of Write a note on alkali metals and...

Question 9

If a set of results are accurate, then they must also be precise.

Accepted Answer

A) True 
 B)False

Question 10

Compounds are indivisible particles.

Accepted Answer

A) True 
 B)False

Question 11

A law attempts to explain why nature behaves as it does.

Accepted Answer

A) True 
 B)False

Question 12

An alloy is a homogeneous mixture of two or more metals.

Accepted Answer

A) True 
 B)False

Question 13

_____ have neither fixed shapes nor fixed volumes.

Accepted Answer

The answer of _____ have neither fixed shapes nor fixed...

Question 14

Which of the following is the abbreviation for the SI unit for mass?

Accepted Answer

A)  lbs 
B)  oz 
C)  kg 
D)  gm 
E)  st

Question 15

Tritium is an isotope of hydrogen with a mass number of 3. Which of the following accurately represents tritium?

Accepted Answer

A)  ${ } _ { 1 } ^ { 1 } \mathrm { H }$ 
B)  ${ } _ { 1 } ^ { 2 } \mathrm { H }$ 
C)  ${ } _ { 1 } ^ { 3 } \mathrm { H }$ 
D)  ${ } _ { 2 } ^ { 1 } \mathrm { H }$ 
E)  ${ } _ { 3 } ^ { 1 } \mathrm { H }$

Question 16

_____ states that when two elements form a series of compounds, the ratios of the masses of the second element that are present per gram of the first element can almost always be expressed as the ratios of integers.

Accepted Answer

A)  The law of conservation of mass 
B)  The law of definite proportions 
C)  The atomic theory of matter 
D)  The law of multiple proportions 
E)  The law of conservation of matter

Question 17

_____ rays have no charge, so they are not deflected by electric or magnetic fields.

Accepted Answer

The answer of _____ rays have no charge, so they...

Question 18

Explain how the atomic mass for an element with two or more isotopes is calculated with an example.

Accepted Answer

The answer of Explain how the atomic mass for an...

Question 19

Write a note on the physical and chemical properties of matter.

Accepted Answer

The answer of Write a note on the physical and...

Question 20

The extraction of metal from ores is called _____.

Accepted Answer

The answer of The extraction of metal from ores is...

Exam 1: Introduction to Chemistry

Which of the following is a trace element required in the human diet?

Physical change is a process by which matter changes from one physical state to another.

A nanometer is equal to _____ meters.

_____, by definition are measurements which consist of both a number and a unit.

What is amplification? How do elements present in miniscule amounts in the body bring about large changes in a person's health?

α rays are made of particles having the higher mass-to-charge ratio and subsequently have the least penetrative capability.

Explain how scientists use the scientific method to answer questions.

Write a note on alkali metals and their applications.

If a set of results are accurate, then they must also be precise.

Compounds are indivisible particles.

A law attempts to explain why nature behaves as it does.

An alloy is a homogeneous mixture of two or more metals.

_____ have neither fixed shapes nor fixed volumes.

Which of the following is the abbreviation for the SI unit for mass?

Tritium is an isotope of hydrogen with a mass number of 3. Which of the following accurately represents tritium?

_____ states that when two elements form a series of compounds, the ratios of the masses of the second element that are present per gram of the first element can almost always be expressed as the ratios of integers.

_____ rays have no charge, so they are not deflected by electric or magnetic fields.

Explain how the atomic mass for an element with two or more isotopes is calculated with an example.

Write a note on the physical and chemical properties of matter.

The extraction of metal from ores is called _____.