What makes an isotope radioactive? Are all isotopes radioactive?

Answers

Answer 1

Answer:

Radioactive Elements

In elements with more than 83 protons, all of the isotopes are radioactive. ... The force of repulsion among all those protons makes the nuclei unstable. Elements with more than 92 protons have such unstable nuclei that they don't even exist in nature.

Explanation:

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Related Questions

Which term describes the type of digestion that results from chewing and crushing food into smaller pieces?
absorption
peristalsis
chemical digestion
mechanical digestion

Answers

Answer:

mechanical digestion

Explanation:

(a) Part A Which claim is best supported by the data?
A)As annual precipitation increases, the populations of Species A and B increase.
B)As annual precipitation increases, the populations of Species A and B decrease.
C)As annual precipitation increases, the population of Species A increases while Species B decreases.
D)As annual precipitation increases, the population of Species A decreases while Species B increases.

Part B If the precipitation levels observed in year '09 remain the same and other resources remain constant, identify and describe what can be predicted to occur with the population of Species B over the next 6 years? Enter the answer in the box.

Answers

Answer:

D

Explanation:

It increases

The claim is best supported by the data is as annual precipitation increases, the populations of Species A and B decrease. Thus, option B is correct.

When annual precipitation increases according to the data?

As annual precipitation increases, the populations of Species A and B decrease. As annual precipitation increases, the population of Species A increases while Species B decreases. As annual precipitation increases, the population of Species A decreases while Species B increases.

As annual precipitation increases, the populations of Species A and B increase. As annual precipitation increases, the population of Species A decreases while Species B increases.

If the precipitation levels observed in year '09 remain the same and other resources remain constant, identify and describe what can be predicted to occur with the population of Species B over the next 6 years.

Therefore, The claim is best supported by the data is as annual precipitation increases, the populations of Species A and B decrease. Thus, option B is correct.

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Why is it we cannot directly observe a genotype, but can sometimes infer it?

Answers

We cannot directly observe a genotype because there are multiple options for genotypes.


Which organs are shaped like beans and are located just below your ribs, in the middle of your back?

Answers

Answer: Your kidneys are bean-shaped organs, each about the size of your fist. They are located near the middle of your back, just below the rib cage.

Explanation:

Answer:

Kidneys

Explanation:

The kidneys are two bean-shaped organs, each about the size of a fist. They are located just below the rib cage, one on each side of your spine. Healthy kidneys filter about a half cup of blood every minute, removing wastes and extra water to make urine.

Why do you think they split the reptiles into four different groups?

Answers

Large morphological differences as well as a long history of divergence throughout evolutionary history

What is an example of victimology?

A victim's regular routine and mannerisms are analyzed.
A suspect's habits and food preferences are analyzed.
A list of victims is compiled and released to reporters.
A suspect's childhood history is analyzed.

Answers

Answer:

A

Explanation:

Criminal profilers use a method called victimology to understand more about the killer. By analyzing behavior, habits, and the temperament of the victim(s), the criminal profiler is able to construct a physiological profile of the person

Which plant structure absorbs most of the water and nutrients needed from the soil? tap roots secondary roots root hairs fibrous roots

Answers

Answer:

Root hairs

Explanation:

This is because the root hairs are part of root structure that are tubular and have lateral enlongations.

The root hairs increase the surface area of the root and allow for exchange.

They gave direct contact with the soil and then absorb water and nutrients to their increased surface area.

Which of the following signal words can be used to
give examples of an idea?
A. Then
O B. Eventually
O C. Because
D. Specifically

Answers

Answer:

A

Explanation:

If your word is "than" it is a signal word that is used to give an idea because it allows the writer to compare and contrast ideas or phrases.

Answer:

C. Because

Explanation:

Earth science question. Please help

Answers

Answer:

answer choice 4, more rain and a steeper slope cause it to flow faster

Explanation:

When a pelican gets hot, it opens its bill and flutters the sides of its pouch. This causes water to evaporate, which cools the pelican. What type of adaptation is the movement of the pelican’s pouch?


behavioral adaptation

life-cycle adaptation

physical adaptation

reproductive adaptation

Answers

Answer:

Behavioral adaptation

Explanation:

life-cycle adaptation would be like a tadpole growing legs.

physical adaptation would be a change in the animals body like wings for a bat.

reproductive would be beneficial for making offspring like a peacocks bright feathers that attract mates.

Behavioral adaptations are responses to external stimulus like heat.

So behavioral is the best option.

Sam owns a horse. He suspects the presence of Equine Infectious Anemia (EIA). What should he request his veterinarian to do?

Answers

Answer:

The question is incomplete because the options are not given, here are the options from another website.

A .rectal palpation

B.Coggins test

C. castration

D. vaccination

The correct option is B.

Coggins test

Explanation:

This is because coggins test is the test

carried out to check for Equine Infectious Anemia (EIA) antibodies if present in the horse's blood. Blood samples of the horse are collected and must be sent to a state approved laboratory. This test is majorly fine and needed whenever you want to take your horse to a show or whenever you transport your horse across state lines.

can someone plzz help me on this its hard:( ill give brainliest

Answers

Answer:

B

Explanation:

how does the mammalian body protect itself against infections​

Answers

The body defends against infection by increasing the number of certain types of white blood cells (neutrophils and monocytes), which engulf and destroy invading microorganisms. The increase can occur within several hours, largely because white blood cells are released from the bone marrow, where they are made.

why does my feet smell?

Answers

u stink nvffvbhnbgvfcdrxsezawsexdrcftvybhun

Answer:

Because you stink, and it's sweaty.

Explanation:

I suggest you use a condom to scrub soap off each toe! <3

I don’t have a lot of time please help!
No websites or links.

Don’t answer it if you don’t now. Thanks

Answers

ANSWER: KR or Krypton has 36 protons

how we know that is because the atomic number of an element will ALWAYS be the same number of protons

for example if we have atomic number 79 for AU or gold then that tells you gold will have 79 protons

hope this makes since and helps :)

The role of a pioneer species in primary succession is to change a bare habitat into Abe that is suitable for other organisms. A species that is responsible for primary succession in an ecosystem is most likely able to-

A.)live at high altitudes
B.)migrate during the winter
C.)survive any predator
D.)carry out photosynthesis

Answers

I think it’s C.survive any predator. Not really sure

What Heterotroph mean?

Answers

Answer:

below

Explanation:

An organism whose food needs are met by complex organic substances.

Answer:

an organism deriving its nutritional requirements from complex organic substances.

A K-selected species will exhibit which of
the following characteristics?
A. wildly fluctuating population size
B. generalized niche
C. early reproductive age
D. low population growth rate

Answers

Answer:

it's D

Explanation:

This is because K-selected species produce fewer offspring in their life time compared to R-selected species therefore their growth rate is lower.

The option or characteristic that will be exhibited by K-selected species is that it has a low population growth rate. Thus, the correct option for this question is D.

What is a K-selected species?

A K-selected species may be defined as a more or less stable population adapted to exist at or near the carrying capacity. These types of species have specialized niches along with a logistic growth model.

The reproductive rate of these species is low as compared to r-selected species. Reproductive age is late. They have a fairly strong competitive ability due to which they show very less fluctuation in population size. Examples of these species may include canopy trees, large mammals, large turtles, some parrots, etc.

Therefore, the option or characteristic that will be exhibited by K-selected species is that it has a low population growth rate. Thus, the correct option for this question is D.

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If humans began hunting seals MORE, what would happen to the population of Penguins and Krill?

Answers

Answer:

the population of penguins and krill will go up

the population would then grow of penguins

How many chromosomes are in the cells after they divide? How many chromatids are there?

Answers

Answer:

two chromatids

After DNA replication, each chromosome now consists of two physically attached sister chromatids. After chromosome condensation, the chromosomes condense to form compact structures (still made up of two chromatids). As a cell prepares to divide, it must make a copy of each of its chromosomes.

Explanation:

hope it help to you:)

Can someone plz help

Answers

The answer to your question is the first one
A. The passage of genetic instructions for one generation to the next

Name, describe, and give examples of two types of succession in ecosystems. ​

Answers

Answer: Primary and secondary succession

Explanation: In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area previously occupied by living things is disturbed—disrupted—then recolonized following the disturbance.

5. What does Grover give Percy?

Answers

Answer:

Explanation:

Grover gives Percy a present in a shoebox and  it's the horn that Percy snapped off of the head of the Minotaur.

Answered by the ONE & ONLY #QUEEN herself aka #DRIPPQUEENMO!!

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Name 2 chordates that are not vertebrates.

Answers

Answer:

The other two subphyla are invertebrate chordates that lack a backbone. Members of the subphylum Urochordata are tunicates (also called sea squirts). Members of the subphylum Cephalochordata are lancelets. Both tunicates and lancelets are small and primitive.

Explanation:

Not really an explanation for this one.


Students are growing plants in pots on the windowsill of
their classroom. After spring break, a student notices
that one of the potted plants furthest from the
windowsill has changed shape, as shown below....Which
statement best explains why this plant grew at a
different angle? *

A) A plant growth hormone accumulates in the shaded side
of the stems, causing the lower leaves to fall off.

B) A plant growth hormone accumulates in the shaded side of the stems, stimulating those sides to grow faster and
bend toward the light.

C) A plant hormone accumulates in the unshaded side of
plant cells, causing the plants to grow. much faster

D)A plant hormone accumulates in the shaded side of plant
cells, stimulating the plants to produce more flowers.

Answers

Answer:

ANSWER : B I think i am not sure i hope it helps

In which ways might ocean currents be like streams and rivers on land

Answers

Answer:

Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface.

Ocean currents in different ways might be like streams and rivers on land they sweep along the predictable paths. Ocean currents flow at the surface, and flow deep within the waterbodies.

What are Ocean currents?

Ocean currents act much like similar to a conveyer belt. Ocean currents transport warm water and precipitation of water from the equator towards the poles and cold water from the poles back to the tropics of the globe. Thus, the currents which regulate global climate, helping to counteract the uneven distribution of solar radiations reaching to the Earth's surface.

Ocean currents flow like that of vast rivers, sweeping along with the predictable paths. Some of the ocean currents flow at the surface and others flow deep within the water. Some ocean currents flow for very short distances, however others cross entire ocean basins and even circle the globe.

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tRNA uses (anticodons/codons) to match to the mRNA.

Answers

Answer:

anticodons

Explanation:

codons are for mRNA

tRNA uses anticodons to match to the mRNA.

Which one does tRNA uses?

tRNA (transfer RNA) molecules are responsible for carrying specific amino acids to the ribosomes during protein synthesis.

They have an anticodon region that consists of three nucleotides that are complementary to the codons on the mRNA (messenger RNA). The codons on the mRNA determine the sequence of amino acids in the growing polypeptide chain.

The anticodon on the tRNA base pairs with the complementary codon on the mRNA, ensuring that the correct amino acid is incorporated into the growing protein chain. The matching between the anticodon and codon is essential for the accurate translation of genetic information into protein synthesis.

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Which describes the habitat of a frog?
color for camouflage
prey for snakes
eats insects
marshes and ponds

Answers

Marshes and ponds is the correct answer

Marshes and ponds describe the habitat of a frog. So, the correct option is D.

What is Habitat?

An area or place where an organism or a collection of organisms naturally lives and thrives is known as a habitat. It includes all the physical, biological and environmental elements necessary for growth and reproduction in a given place. A habitat can be any form of ecosystem, including a forest, desert, ocean, swamp, or dryland.

Temperature, precipitation, soil, vegetation, and other elements that are specific to each ecosystem affect what types of organisms can survive there. Other important elements of a habitat are access to food, water and shelter. Habitat theory is important to ecology and conservation biology.

Therefore, the correct option is D.

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how does the DNA determine the order of amino acids?

Answers

The order of amino acids in the DNA depend on the protein molecules that it is made of basically it depends on the genes

PLEASE HELP!!
What forms are chromosomes in during:
Telophase
Early prophase
Late prophase
Metaphase
Anaphase
Telophase
Cytokinesis

(Choices are chromatins, chromatids, and sister chromatids)

Answers

Answer:

chromatids.

Explanation:

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