The compound HNO3 can be described as an

Only radioactive isotopes are useful for radiometric dating or medical diagnostic exams. Briefly explain why stable isotopes wou

Mnenie [13.5K]

Answer:

Explanation:

Isotopes are atoms of elements that have the same atomic number but different mass number hence ISOTOPY. Radioactive Isotopes on the other hand are unstable as they either undergo Alpha decay, beta decay or gamma decay compared to stable isotopes.

Radioactive elements decay at varyinf rates as such the rate of radioactive decay is used in the characterization of radioactive element and mostly expressed in terms of the half life of the radioactive elements.

Half life is the time taken for half of the total atoms of an elements to decay into half of its initial sizes. for example, the half life of radium-226 is 1622 years, it implies that if we have 1000000 radium atoms at the beginning, then at the end of 1622years, 500000 would have disintegrated. These phenomenon can never be experienced by stable isotopes as such they can not be used in carbon dating techniques. reason why uranium-238 is mostly and commonly used in the earth crust to estimate the ages of rocks because it has a half life of 4.5 x 10^9 years.

And also, the radioactive isotopes of most common light element are short, they have very short half life (few days or weeks) and they decay rapidly to vanshing point, as such, they are not found in nature to any reasonable extent.

8 0

3 years ago

1 of 15

Svetlanka [38]

Answer:

#2 The writer of "Harrison Bergeron," Kurt Vonnegut, seems to believe that the suppression of individuality within a society...

Question 3 options:

is necessary to maintain order and prevent chaos.

allows the government to unfairly subdue and control its citizens

benefits the general public by creating a more equal society

gives the people more power and influence in the government

#3 Which statement BEST expresses the theme of this short story? Narrow your choices and think carefully!

Question 4 options:

Attempting to achieve complete equality will only result in widespread dissatisfaction and lack of creativity.

The government should encourage everyone to hide their differences in order to have a more peaceful and equal society.

Forcing uniformity on people doesn't result in equality, but rather causes conflict and unhappiness.

People don't realize how important individuality is until they have what makes them different taken away.

PART A: How do the different handicaps contribute to the theme of the story?

Question 5 options:

They show how being unique can be dangerous to yourself and the people around you.

They emphasize how the most ordinary people are often the most valued in a society.

They stress how the work towards achieving total equality won't be easy or pleasant.

They illustrate how much must be done to make the most unique and talented individuals conform.

PART B: Which section from the text best supports the answer to Part A?

Question 6 options:

“He began to think glimmeringly about his abnormal son who was now in jail, about Harrison, but a twenty-one-gun salute in his head stopped that.” (Paragraph 21)

“he tried. That's the big thing. He tried to do the best he could with what God gave him. He should get a nice raise for trying so hard.” (Paragraph 39)

“And it was easy to see that she was the strongest and most graceful of all the dancers, for her handicap bags were as big as those worn by two-hundred pound men.” (Paragraph 40)

“Diana Moon Glampers loaded the gun again. She aimed it at the musicians and told them they had ten seconds to get their handicaps back on.” (Paragraph 79)

Which statement best expresses the central idea in the article "Proposed Treatment to Fix Genetic Diseases Raises Ethical Issues"?

Question 7 options:

Scientists have discovered a way to prevent genetic defects in babies, but some believe genetic development should be left to nature

Scientists have discovered a way to prevent genetic defects in babies, but some worry that the process could be used for great economic gain

Scientists have discovered a way to prevent genetic defects in babies, but the method is against many families’ religions

Scientists have discovered a way to prevent genetic defects in babies, but the process is still very risky

The primary purpose of the article is to...

Question 8 options:

inform

entertain

narrate

persuade

PART A: In paragraph 3 and paragraph 24, what is meant by the phrase “designer babies”?

Question 9 options:

Babies that are bred to be particularly attractive

Babies whose DNA has been altered to enhance a specific positive trait

Babies whose DNA has been altered to avoid disease

The biological children of genetic researchers

PART B: What detail from the text best supports the answer for Part A?

Question 10 options:

“…the research would create an egg with healthy mitochondrial DNA (mtDNA).” (Paragraph 4)

“First of all, the baby would be born with genes from three different people… (Paragraph 18)

“…we're going to allow inheritable genetic changes to make healthier children…” (Paragraph 25)

“…we’re going to allow these kinds of genetic engineering experiments to make children who are more intelligent or more athletic or have perfect pitch…” (Paragraph 25)

The primary purpose of Gavin DeGraw's song "I Don't Want To Be" is to...

Question 11 options:

inform

entertain

narrate

persuade

When DeGraw says, "I'm tired of looking 'round rooms /Wondering what I've got to do /Or who I'm supposed to be" he is saying that...

Question 12 options:

constantly reinventing himself is exhausting, so he has decided to conform to the most commonly accepted standards

conforming is easier than being a unique individual

he is no longer willing to conform to meet the expectations of whomever he is with at any given time

he doesn't care if he has any friends or not

Explanation:

ummm maybe this help

8 0

3 years ago

State and explain the relative change in the pH and in the buffer-component concentration ratio, [NaA]/[HA], for each of the fol

melisa1 [442]

When pure HA is added to the buffer, the buffer component ratio and the pH decrease.

<h3>State and explain the relative change in the pH and in the buffer-component concentration ratio, [NaA]/[HA] for the dissolve of pure HA in the buffer.</h3>

When pure HA is added to the buffer, the buffer component ratio and the pH decrease. The added HA increases the concentrations of NA and HA. However, there is a greater relative increase in the concentration of HA. Hence, the ratio of [NaA]/[HA] decreases, causing the solution to become more acidic.

The capacity of a buffer to withstand pH change is measured. The concentration of the buffer's components namely, the acid and its conjugate base determine this ability. Greater buffer capacity is associated with higher buffer concentration.

To learn more about buffer-component, Visit:

brainly.com/question/9542245

#SPJ4

8 0

2 years ago

Whats the atomic mass of an atom

lapo4ka [179]

Atomic mass is usually defined by the total number of protons, neutrons and electrons in a single atom. You can measure it by spectrometry.

8 0

3 years ago

Read 2 more answers

What does ClF3 stand for