Question 1

The element that is essential for human nutrition and is responsible for formation of bones and teeth is ___.

Accepted Answer

The answer of The element that is essential for human...

Question 2

Gamma rays require a thick slab of concrete or lead to block them because they

Accepted Answer

A)  have the lowest energy. 
B)  are so energetic that they have a very high penetrating power. 
C)  are large in size. 
D)  are small in size. 
A)  have the lowest energy. 
B)  are so energetic that they have a very high penetrating power. 
C)  are large in size. 
D)  are small in size.

Question 3

Define the term element. Give one example of an element that is a metal, an element that is a nonmetal, and an element that is a semimetal.

Accepted Answer

An element is a substance comp

Question 4

If one starts with 10.0 grams of a radioactive substance, how much will remain after 3 half lives?

Accepted Answer

A)  1.25 g 
B)  2.50 g 
C)  3.33 g 
D)  5.00 g 
A)  1.25 g 
B)  2.50 g 
C)  3.33 g 
D)  5.00 g

Question 5

An alpha particle is identical to which of the following?

Accepted Answer

A)  the nucleus of a hydrogen atom 
B)  an electron 
C)  a beta radiation 
D)  the nucleus of a helium-4-atom 
A)  the nucleus of a hydrogen atom 
B)  an electron 
C)  a beta radiation 
D)  the nucleus of a helium-4-atom

Question 6

The number of moles of calcium (Ca) represented by 7.39 g of calcium is

Accepted Answer

A)  40.0 moles of Ca. 
B)  18.6 moles of Ca. 
C)  0.184 mole of Ca. 
D)  296 moles of Ca. 
A)  40.0 moles of Ca. 
B)  18.6 moles of Ca. 
C)  0.184 mole of Ca. 
D)  296 moles of Ca.

Question 7

Which of the following statements is true about a beta particle?

Accepted Answer

A)  it has the same mass as a helium nucleus 
B)  when ejected from the nucleus formed has same mass as the original isotope 
C)  when ejected from the nucleus of a radioisotope, the nucleus formed has one more proton 
D)  it is the same as a gamma radiation 
A)  it has the same mass as a helium nucleus 
B)  when ejected from the nucleus formed has same mass as the original isotope 
C)  when ejected from the nucleus of a radioisotope, the nucleus formed has one more proton 
D)  it is the same as a gamma radiation

Question 8

Which of the substances listed below is not an element?

Accepted Answer

A)  sodium 
B)  iron 
C)  air 
D)  carbon 
A)  sodium 
B)  iron 
C)  air 
D)  carbon

Question 9

Trace elements and vitamins are required for the body to function properly

Accepted Answer

A) True 
 B)False

Question 10

A Nutrition Facts label on a food package indicates that one serving contains 2% of the recommended daily allowance (RDA) of iodine. If the serving size is one cup and the RDA for iodine is 0.15 mg per day, calculate the amount (in milligrams) supplied by one serving.

Accepted Answer

A)  0.0030 mg 
B)  15 mg 
C)  20 mg 
D)  0.15 mg 
A)  0.0030 mg 
B)  15 mg 
C)  20 mg 
D)  0.15 mg

Question 11

In an alpha therapy, Radium-223is used as a radioactive $\alpha$-emitter. The correct nuclear equation for this emission event is?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 12

The number of ___ is the same in one mole of sodium as in one mole of zinc.

Accepted Answer

The answer of The number of ___ is the same...

Question 13

A patient who has undergone a PET scan that used fluorine-18 tagged glucose is likely to emit which of the following a few hours after the procedure?

Accepted Answer

A)  x-rays 
B)  alpha particles 
C)  gamma radiation 
D)  beta particles 
A)  x-rays 
B)  alpha particles 
C)  gamma radiation 
D)  beta particles

Question 14

Sulfur has ___ electrons and ___ valence electrons.

Accepted Answer

A)  16, 6 
B)  32, 4 
C)  16, 0 
D)  32, 6 
A)  16, 6 
B)  32, 4 
C)  16, 0 
D)  32, 6

Question 15

Describe two ways to protect oneself from exposure to radiation when working in an environment that contains radioactive sources.

Accepted Answer

Distance and shieldi

Question 16

Iron-59 has a half-life of 45 days. How much of a 50.0-gram sample would remain after 180 days?

Accepted Answer

A)  1.00 g 
B)  3.13 g 
C)  25.0 g 
D)  There is no way to determine the results. 
A)  1.00 g 
B)  3.13 g 
C)  25.0 g 
D)  There is no way to determine the results.

Question 17

The higher up within a group or family on the periodic table,

Accepted Answer

A)  the heavier the nucleus. 
B)  the more the element is likely to conduct electricity. 
C)  the more nonmetallic in character. 
D)  the more the element is likely to be a semimetal. 
A)  the heavier the nucleus. 
B)  the more the element is likely to conduct electricity. 
C)  the more nonmetallic in character. 
D)  the more the element is likely to be a semimetal.

Question 18

If radium,   , were to emit an alpha particle, what would be the other product?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 19

Most elements have radioisotopes. What is a radioisotope?

Accepted Answer

A)  An isotope that has a different atomic number. 
B)  An isotope that releases nuclear radiation. 
C)  An isotope that releases electrical radiation. 
D)  Any isotope that can absorb nuclear particles. 
A)  An isotope that has a different atomic number. 
B)  An isotope that releases nuclear radiation. 
C)  An isotope that releases electrical radiation. 
D)  Any isotope that can absorb nuclear particles.

Question 20

Calculate the number of atoms in 2.61 grams of silicon.

Accepted Answer

The answer of Calculate the number of atoms in 2.61...

The element that is essential for human nutrition and is responsible for formation of bones and teeth is ___.

Gamma rays require a thick slab of concrete or lead to block them because they

Define the term element. Give one example of an element that is a metal, an element that is a nonmetal, and an element that is a semimetal.

If one starts with 10.0 grams of a radioactive substance, how much will remain after 3 half lives?

An alpha particle is identical to which of the following?

The number of moles of calcium (Ca) represented by 7.39 g of calcium is

Which of the following statements is true about a beta particle?

Which of the substances listed below is not an element?

Trace elements and vitamins are required for the body to function properly

A Nutrition Facts label on a food package indicates that one serving contains 2% of the recommended daily allowance (RDA) of iodine. If the serving size is one cup and the RDA for iodine is 0.15 mg per day, calculate the amount (in milligrams) supplied by one serving.

In an alpha therapy, Radium-223is used as a radioactive $\alpha$ -emitter. The correct nuclear equation for this emission event is?

The number of ___ is the same in one mole of sodium as in one mole of zinc.

A patient who has undergone a PET scan that used fluorine-18 tagged glucose is likely to emit which of the following a few hours after the procedure?

Sulfur has _ electrons and _ valence electrons.

Describe two ways to protect oneself from exposure to radiation when working in an environment that contains radioactive sources.

Iron-59 has a half-life of 45 days. How much of a 50.0-gram sample would remain after 180 days?

The higher up within a group or family on the periodic table,

If radium, , were to emit an alpha particle, what would be the other product?

Most elements have radioisotopes. What is a radioisotope?

Calculate the number of atoms in 2.61 grams of silicon.

Science and Measurements

Compounds

An Introduction to Organic Compounds

Reactions

Gases, Solutions, Colloids, and Suspensions

Acids, Bases, and Equilibrium

Organic Reactions Hydrocarbons, Carboxlic Acids, Amines, and Related Compounds

Organic Reactions 2-Alcohols, Ethers, Aldehydes, and Ketones

Carbohydrates

Lipids and Membranes

Peptides, Proteins, and Enzymes

Nucleic Acids

Metabolism

Filters

Exam 2: Atoms and Elements

The element that is essential for human nutrition and is responsible for formation of bones and teeth is ___.

Gamma rays require a thick slab of concrete or lead to block them because they

Define the term element. Give one example of an element that is a metal, an element that is a nonmetal, and an element that is a semimetal.

If one starts with 10.0 grams of a radioactive substance, how much will remain after 3 half lives?

An alpha particle is identical to which of the following?

The number of moles of calcium (Ca) represented by 7.39 g of calcium is

Which of the following statements is true about a beta particle?

Which of the substances listed below is not an element?

Trace elements and vitamins are required for the body to function properly

A Nutrition Facts label on a food package indicates that one serving contains 2% of the recommended daily allowance (RDA) of iodine. If the serving size is one cup and the RDA for iodine is 0.15 mg per day, calculate the amount (in milligrams) supplied by one serving.

In an alpha therapy, Radium-223is used as a radioactive α\alphaα -emitter. The correct nuclear equation for this emission event is?

The number of ___ is the same in one mole of sodium as in one mole of zinc.

A patient who has undergone a PET scan that used fluorine-18 tagged glucose is likely to emit which of the following a few hours after the procedure?

Sulfur has ___ electrons and ___ valence electrons.

Describe two ways to protect oneself from exposure to radiation when working in an environment that contains radioactive sources.

Iron-59 has a half-life of 45 days. How much of a 50.0-gram sample would remain after 180 days?

The higher up within a group or family on the periodic table,

If radium, , were to emit an alpha particle, what would be the other product?

Most elements have radioisotopes. What is a radioisotope?

Calculate the number of atoms in 2.61 grams of silicon.

Science and Measurements

Compounds

An Introduction to Organic Compounds

Reactions

Gases, Solutions, Colloids, and Suspensions

Acids, Bases, and Equilibrium

Organic Reactions Hydrocarbons, Carboxlic Acids, Amines, and Related Compounds

Organic Reactions 2-Alcohols, Ethers, Aldehydes, and Ketones

Carbohydrates

Lipids and Membranes

Peptides, Proteins, and Enzymes

Nucleic Acids

Metabolism

Filters

In an alpha therapy, Radium-223is used as a radioactive $\alpha$ -emitter. The correct nuclear equation for this emission event is?

Sulfur has _ electrons and _ valence electrons.