Which element is radioactive, is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. You can find this element in group 5A (15) directly to the right of the element that has 4 valence electrons in its 4th energy level.

Answers

Answer 1

Answer:

Astatine

Explanation:


Related Questions

what do bacteria cells and human cells have in common

Answers

Answer:

They have cytoplasm, a plasma membrane, and ribosomes.

Explanation:

( please, do not comment if you do not know the answer, I will give Brianlist ) Please complete the following:
1. You and Tim, who is larger than you are outside with a wagon. Tim (the bigger person) gets in the wagon and you (the smaller one) pull it. As you pull
it, you accelerate until you reach a comfortable velocity. Then you stop and switch places with Tim. Tim now pulls you in the wagon, accelerating
from a stop to a comfortable velocity. Now, Tim may be bigger than you, but you have been working out and are just as strong as Tim, so the force
that Tim uses to pull the wagon is the same force that you used. You both pull with the exact same amount of force. Who was riding in the wagon
when it had the greatest acceleration during start up? Why? Use Newton's second law to explain.
2. Now Sara comes along, and she is the exact same size as you. However, she is even stronger than you! When she pulls you in the wagon, she pulls
with a greater force than when you pull her. Now who is in the wagon when it has the greatest acceleration? Explain, using Newton's second law.

Answers

Answer:

2. Sarah

Explanation:

because she is stronger, she is able to pull faster and easier because of the amount of weight she can carry vs the amount of weight you can carry. Although you are the same height, she has more muscle.

Compare the thickness of the right and left ventricles. Which ventricle is thicker the right or left. Explain the difference.

Answers

Answer:

When comparing the thickness of the heart's ventricles, the left one is thicker than the right one, because it must generate more pressure to pump blood throughout the body.

Explanation:

In the human heart, the right ventricle is in charge of pumping the blood to the lungs —initiating the minor circuit of the circulation— while the left ventricle is in charge of pumping the blood to the whole body.

To fulfill its function, each ventricle has a specific thickness in its walls, the left one being thicker than the right one.

The right ventricle is a chamber that handles more volume than pressure, and its walls are thinner because it does not require much pressure to pump the blood to the lungs. The left ventricle has a thicker muscular wall because it is a chamber that must generate a high pumping pressure, so its contraction force must be greater.

The structure of the myocardium in the heart is what allows each chamber to fulfill its function adequately.

What do seeds need in order to germinate

A. Water and germs
B. Angiosperm
C. Water and warmth
D. Animals and wind

Answers

Answer:

C. water and warmth, hope this helps :)

I will give out 90 points. Please answer!!
DNA Polymerase is used to (select all that apply) the answer is not just “synthesize the daughter strand)
-“read” the template strand
-synthesize the daughter strand
-unzip the template strand
-cut the template strand
-cut the daughter strand

IS THE ANSWER 2-5 and not 1??

Answers

The answer is number 4 hope this helps

DNA polymerase synthesizes the daughter strand along with reading the template strand. The correct option is A and B.

What is DNA polymerase?

The primary enzyme that catalyzes the linking of the 3′ hydroxyl group of the end nucleotide to the 5′ phosphate of the nucleotide to be added is DNA polymerase.

DNA polymerase synthesizes the daughter strand along with reading the template strand.

Thus, the correct options are A and B.

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how to prevent human man made disaster​?

Answers

Firstly, if you can't avoid it, you need to evade the area, or otherwise hide, don't find anyway near it. Don't let it through any of yourself.

There are multiple regulations in which a man made disaster is meant to be advised however if one does happen it is best to seek shelter

What are two types of fermentation

Answers

Answer:

There are two types of fermentation: alcoholic fermentation and lactic acid fermentation.

Explanation: branilest plz

Which type of rock did the geologist most likely find? gneiss limestone marble sandstone

Answers

Answer:

Limestome

Explanation:

I took the test u welcome

Answer:

B

Explanation:

________ is an example of the moon's gravitational force on Earth.​

Answers

Answer:

Waves!

Explanation:

Answer: tides

Explanation:

Tides are an example of the Moon's gravitational oull on the planet of Earth. The ocean rises because the moon and elements in the core act like magents, and the water goes up.

Explain how the electron transport chain makes ATP.

Answers

Answer:

t

Explanation:

While Glycolysis and the Citric Acid Cycle make the necessary precursors, the electron transport chain is where a majority of the ATP is created. The Electron Transport Chain makes energy ... At the end of the chain the electrons are taken up by oxygen molecules to make water. This is why oxygen is known as the final electron acceptor.

Answer:

Explanation:

during electron transport, energy is used to pump hydrogen ions across the mitochondrial inner membrane, from the matrix into the intermembrane space. A chemiosmotic gradient causes hydrogen ions to flow back across the mitochondrial membrane into the matrix through ATP synthase, producing ATP

How can fracking impact water quality? (1 point)
A.Methane leaks make the water supply flammable.
B.Power pumps drain water from rivers and reservoirs.
C.The heated water becomes unfit for consumption.
D.Smelting releases toxic metals into the water supply.​

Answers

Answer:

a

Explanation:

Due to the current relationship with groundwater and surface water, fracturing fluids like return fluids might pose a risk to both, hence option a is correct.

What is fracking?

It's possible for water to get contaminated during fracking owing to chemicals that are accidentally spilled,in the water during the migration of thermogenic methane gas.

Since a hydraulic fracture might intercept a natural fracture, such as a geological fault, and be connected to the surface, this presents another potential source of pollution.

Therefore, presence in the subsoil may be encouraged during the fracturing process, which may enhance the incidence of chemical reactions and the production of new contaminating substances, hence option a is correct.

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18. A solution of CaCl2is_?__ [ A. acidic
B. basic
N. neutral]

Answers

I believe the answer is N

The picture shows fruit produced by two parents and fruit produced by one of their offspring.

Which of these best describes this inheritance pattern?
codominance because he fruit color of the offspring is an intermediate form of the parents’ fruit color
codominance because both parents’ colors are expressed in the offspring
incomplete dominance because both parents’ colors are both visible in the offspring
incomplete dominance because the fruit color of the offspring is an intermediate form of the parents’ fruit color

Answers

Answer:

d

Explanation:

I got it right on edge

Answer:

its D

Explanation:

because if one is Black and white the offspring would be Gray

HOPE THIS HELPS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Cells througout a multicellular organism develop different ways to perform various tasks - this is called cellular specialization and/or cell differentiation.

true or false

Answers

It is false hope this helps

The deer tick attaches to a warm-blooded animal and feeds on its blood.
Ticks need blood at every stage of their life cycle. They also carry Lyme
disease, an illness that can cause joint damage, heart complications, and
kidney problems What type of relationship is this?
Mutualism
Commensalism
Predator Prey
Parasitism

Answers

Parasitism. Ticks are complete parasites with no regard for the well being of their carriers.

Why does ice cream melt and is it a physical change or chemical change

Answers

Answer: PHYSICAL change

Explanation: chemical changes usually have to do with air and pollution and things like that.

What is the process of monomers being chained together called?

A. Polymers

B. Polymerization

C. Monomer regeneration

D. Duplication

Answers

Answer: Polymerization

Explanation: The linking up of monomers is called polymerization. It is the long chains that give polymers their unique properties.

which of the following statements best explains why plants wilt​

Answers

Answer:

needs more context bro

Plants wilt due to lack of water. Dehydration of the plant will cause it to collapse. They also wilt sometimes to prevent damage from high temperatures and the sun. Hope this helps.

What type of research method would best answer the question “How many rivers in Florida have nitrate pollution in them?”

Answers

Answer:

Field study

Explanation:

I took the quiz and got it right. Hope this helps :)

The type of research method that would best answer the given question is field study. The correct option is C.

What is field study?

Field studies are research activities that take place outside of your office or lab, in the context of the user.

There are numerous field-study methods and activities to choose from. Field studies also differ significantly in terms of how the researcher interacts (or does not interact) with participants.

Field research is a qualitative research method that involves observing and interacting with people in their natural settings in order to understand and interpret the social interactions of groups of people, communities, and society.

Field studies provide students with first-hand experiences that promote critical thinking, long-term retention, transferability, positive attitudes toward science, appreciation for nature, and increased scientific curiosity.

Field study is the type of research method that would best answer the given question "How many rivers in Florida have nitrate pollution in them?”

Thus, the correct option is C.

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Your question seems incomplete, the missing options are:

A. relational study

B. cause and effect study

C. field study

10. Which molecule is critical to the body’s ability to absorb oxygen into the blood and distribute it effectively? A muscular B starch C chlorophyll D hemoglobin

Answers

Answer:

Hemoglobina  

Explanation:

Comparing chemical reactions. Identify the true statements below.

Answers

Yo necesito ayuda con biologia

What is the difference between glucose and ATP?

Glucose is a storable form of energy, while ATP is a usable form of energy.

ATP is a storable form of energy, while glucose is a usable form of energy.

ATP is only a usable form of energy, but glucose can be used and stored.

Glucose is only a storable form of energy, but ATP can be used and stored.

Answers

The main difference between glucose and ATP is that Glucose is a storable form of energy, while ATP is a usable form of energy.

Glucose is storable form of energy because it can't be used as energy until it can be broken down by mitochondria of the cell while on the other hand, ATP is the usable form of energy which we can get from the break down of glucose molecules. Our cells use ATP as a fuel to do various activities of the cell so we can conclude that in glucose, energy is present in stored form whereas ATP is used as energy in various activities.

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Explain why reintroducing wolves changed the ecosystem of the park?
WILL GIVE BRAINLIEST

Answers

Answer:

After 70 years without wolves, the reintroduction caused unanticipated change in Yellowstone's ecosystem and even its physical geography. ... The healthier bear population then killed more elk, contributing to the cycle the wolves started.

Explanation:

The reintroduction of wolves had several positive effects on the ecosystem.

What are the effects of reintroduction of wolves?

The reintroduction of wolves caused a trophic cascade of events in the Yellowstone national park. This resulted in an increase in the population of beavers and also brought back several forms of vegetation.

The killing of wolves in the 1930s resulted in the shifting of predatory pressure on the elk population. But, they were much less active in winter. They browsed on cottonwood plants and aspen.

But now, the predatory pressure came back on wolves. This keeps the elks more active. This also resulted in an increase in vegetation.

The reintroduction of wolves also resulted in the increase in the population of beavers because of the recovery of willow strands reflourished due to the activeness of the elk.

Therefore, the reintroduction of the wolf population greatly impacted the ecosystem of the Yellowstone national park causing a ripple of positive effects.

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SCIENCE HELP! WILL GIVE BRAINLIEST

Answers

Answer:

Sucks to suck

Explanation:

hehe

What do you call a system that reverses the original stimulus

A. Positive feedback
B. Negative feedback
C. Stressor
D. Response

Answers

Answer:

Positive feedback

Explanation:

It is positive feedback since positive feedback always ends with counter-signaling/ suppresses the original stimulus. In other words, it goes against the original stimulus.

Answer:

Negative feedback

Explanation:

If right could i get brainliest...but if im wrong then im sorry!

Which process forms sedimentary rock in the rock cycle after sediments accumulate and combine?

Answers

Answer:

SEDEMENTS COMPACT AND CEMENT TOGETHER.

Explanation:

HELP!!! WILL GIVE LOTS OF POINTS!!
The Arizona poppy has adapted to living in areas that receive less rain, but there are still periods of time that a drought occurs. What part(s) of photosynthesis would the plant not be able to perform if there is no rain? What would be the long-term effects on the plant if the drought were to continue? Explain your answer.

Answers

Answer:

I guess it would not grow??

Explanation:

Answer:

When plants lose more water than they can take up from the soil, they become water stressed. ... Such drought conditions certainly inhibit the growth of plants. If it goes long enough without water it will die because the plant uses water for a lot of different jobs needed to keep the plant alive, so the long-term effect is that the plant will die if the drought continues.

The increase of carbon dioxide in the atmosphere is contributing to a global rise in Earth's temperature, known as.....________ & ________ ​

Answers

Answer:

Water vapor and clouds are the major contributors to Earth's greenhouse effect, but a new atmosphere-ocean climate modeling study shows that the planet's temperature ultimately depends on the atmospheric level of carbon dioxide

Explanation:

The temperate grasslands biome includes regions of several continents. What do all of the regions have in common? A. the same species of grazing animals B. the same species of grasses C. the same seasonal patterns of temperature and precipitation D. the same amount of land that is covered in grasses
]

Please answer quick will give you brainliest

Answers

Answer:c

Explanation:

Bc

A biome is a major community of plants and animals living in a specific geographic area and adapted to specific climate conditions. There are five major types of biomes: grassland, forest, desert, aquatic and tundra.

These major biomes can be divided into different categories (e.g., temperate grasslands).

The grassland is a biome that has grasses as the dominant vegetation.

The temperate grasslands have in common the same seasonal patterns of temperature and precipitation (Option C).

In these regions (temperate grasslands) rainfall is insufficient to support trees.

The temperate grasslands have four well-defined seasons. i.e., spring, summer, fall (autumn), and winter.

Some examples of temperate grasslands include Argentine pampas, Euro Asian steppes and North American prairies.

In conclusion, the temperate grasslands have in common the same seasonal patterns of temperature and precipitation (Option C).

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How does mitochondria help the a sperm cell to carry out its function

Answers

The versatility is critical to ensure fertilization success.

Answer:

The acrosome in the head contains enzymes so that a sperm can penetrate an egg. The middle piece is packed with mitochondria to release energy needed to swim and fertilise the egg.

Explanation:

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