A model of tin, an element with the atomic number 50, is shown here. The valence electrons are modeled here in this image. Which statements are supported by the information in the model? Select ALL That apply.

A) Tin needs four more electrons to complete its outer shell.
B) Tin has no neutrons in the nucleus, as is shown in the model.
C) Tin is highly reactive because it only has four valence electrons.
D) Tin is negatively charged because it more electrons than protons.
E) Tin has a low reactivity because it has full inner shells of electrons.

Answer:

Carbon dating cannot be used on most fossils, not only because they are almost always too old, but also because they rarely contain the original carbon of the organism. Also, many fossils are contaminated with carbon from the environment during collection or preservation proceedures.

Explanation:

Carbon dating can not be a useful way to date a fossil of Coelophysis because carbon has a short half life.

Carbon dating, which is also called radiocarbon dating, is defined as the method used to determine the age of an object containing organic material with the use of isotope of carbon.

Carbon is used and absorbed by living organism including radioactive carbon-14. When they die, the radioactive carbon that they've accumulated continues to decay.

Because of the short length of the carbon-14 half-life, carbon dating is only accurate for items that are thousands to tens of thousands of years old. Fossil of Coelophysis are much older than this. Geologists must therefore use elements with longer half-lives.

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Answer:

two

Explanation:

Answer: Mass

Explanation:

Answer: masses

Explanation:

Answer:

C

Explanation:

each daughter received a different number of genes from each parent.

Answer:

a (top)

Explanation:

for B it shows different amount of genes

c is the same as B

d shows that they don't have similar genes

Answer:

i think it is "A" not sure

Explanation:

Answer:

A

Explanation:

if abiotic components include water, temperature, rainfall, and geological features. Biotic components include all of the animal and plant species in the area. the the answer would be A

Answer:

Equator  and Arctic because equator is too hot and arctic is too cold. In equator the rays of the sun fall directly all over the year and this is why the [people living there experience a harsh hot weather and high temperatures. On the other hand people living in the Arctic region experience extreme cold because very little sunlight reaches there. Temperatures are freezing cold all over the year.

plz mark me as brainliest.

Answer:

The arctic does not suffer any seasons as it is furthest from the equator and therefore is covered in ice snow and rarely sees sunlight. Therefore the arctic does not have summer autumn or spring. The arctic is so cold that not many trees can survive and the ones that do are usually chopped down to build houses for the people who live there. The arctic is home to one of the worlds largest seed banks that is there in case of a really bad emergency where the farmers crops in another country are not growing.

Explanation:

Answer:

in 1988, a forest fire destroyed much of yellowstone park.This photo, taken 17 years later,show that the forest is  gradually growing back, small grasses first grew here and are now being replaced by small trees and shrubs, this is an example of the later stages of secondary succession.

The early stages of succession after a forest fire are shown in these pictures. taken four years after the fire. they show the charred  remains of the original forest as well as the small grasses and shrubs that are beginning to throw in the back area.

During a volcanic eruption,molten lava flows over the ground and into the water. after the eruption is over the lava cools and hardens into bare rock.

lichen spores carried on the wind settle on the rock and creat soil. linchens add nutrients to the soil as they die and decay.

Ecosystems are "dynamic". this means that the ecosystem change

over time.

during the ice ages , glaciers once covered areas that are tropical  rainforests today. both natural  forces and human actions cause ecosystem to change

if there is a big ecosystem change caused by natrual forces or human actions   , the plants and animals that live  there might be destroyed. or they may be foreced to  leave.

over time a new community will develop and then that community may be replaced by another.

primary succession is the type of eological succession that happens on new lands, lands where life has not yet been existed. primary succession can take place after lava flow cools and hardens into new land or glacier recedes exposing new land.

secondary succession is the type of succession happens after something destroys the habitat, such as a flood or other natrual disaster. abandoning a field that was once used for agriculture can also lead secondary successionn  

Answer:

The purple flowers were probably was dominate allel and the white flowers were recessive.

Explanation:

Answer:

caused by Earth's orbit around our Sun

Explanation:

:)

Answer:

A scientific theory is a broad explanation that is widely accepted because it is supported by a great deal of evidence. Examples of theories in physical science include Dalton's atomic theory, Einstein's theory of gravity, and the kinetic theory of matter.

I hope this helps a little bit.

Answer: A hypothesis is tested repeatedly and the results are confirmed with evidence

and debated by the scientific community

Explanation:

Answer:

The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

Answer:

A. 75% B. 25%

Explanation:

heterozygous= having two different alleles of a particular gene (Ss)

     S     s

S  SS    Ss

s   sS    ss

A. SS, Ss, sS will have spikes on the tail => 3/4 = 75%

B. ss will have hammer tails => 1/4 = 25%

Answer:

DNA -> RNA is transcription

RNA > Protein is translation

The process illustrated in the figure above is transcription.

Transcription is the first step in gene expression. It involves copying a gene's DNA sequence to make an RNA molecule.

The process of transcription starts when an enzyme called RNA polymerase (RNA pol) attaches to the template DNA strand and starts to gets catalyze the production of complementary RNA.

Large enzymes composed of a lots of  dozen subunits, and when active on DNA, they are also so much  complexed with other . In many cases, these  signal which gene is to be transcribed.

It contains all the information within the code of amino acids and some of them also help in protein synthesis too.

Therefore, the process illustrated in the figure above is transcription.

Therefore, it is transcription.

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Answer:

14

Explanation:

if there is no number behind the element, it counts as one, but if there is, you do 1 times x(whatever the exponent is) and thats how many that one element counts for with atoms. then you just add them all up

Answer:

Starting from your own home is the best way to reduce plastic pollution. You can reduce it by stop using plastic bags, water bottles, anything that is plastic. You can reuse things instead. Use less energy. Turn off the lights whenever you leave the house or if you aren't using it. Lastly, conserve water. Don't let the water running if you aren't using it.

Hope this helps! :)

I recommend you search this same question, and you'll find the answer. If I were to answer your question theoretically, I would copy and paste the answer I searched, but but use some of my own words.

Answer:

Important direct drivers include habitat change, climate change, invasive species, overexploitation, and pollution. Most of the direct drivers of degradation in ecosystems and biodiversity currently remain constant or are growing in intensity in most ecosystems

Explanation:

Important direct drivers include habitat change, climate change, invasive species, overexploitation, and pollution. Most of the direct drivers of degradation in ecosystems and biodiversity currently remain constant or are growing in intensity in most ecosystems

Answer:

3.0

Explanation:

Answer:

Explanation:

a) Air pollution

b) It can cause climate change, respiratory problems etc

c)Winter. More energy is being used in the winter to heat  homes, offices, businesses etc.

Answer:

Topaz, and Corundum.

Explanation:

These 2 are harder than a quartz mineral so quartz can't scratch them. But weaker than a diamond, so diamonds can scratch them.

Answer:

What was the assignment? There's nothing attached, my guy

Explanation:

Answer: Okay What is the assignments?

Explanation:

Answer:

Explanation:

NaCl + AgNO3 → NaNO3 + AgCl

5 atoms

no

Answer:

sodium, chloride, silver, nitrogen, oxygen

9

yes

Explanation:

Answer:

75%

I hope this helps a little bit.

Answer:

37C

20C

-6.67C

50F

86F

-40F

Explanation:

Answer:

B. a meteor

Explanation:

Meteors, also known as shooting stars, are pieces of dust and debris from space that burn up in Earth's atmosphere, where they can create bright streaks across the night sky.

Hope this helped!!!

Answer:

I think it is Option 3: Field 2, because the more inland an area is, the more precipitation there will be.

Explanation:

Whenever it rains, the water evaporates FROM the ocean and the wind blows clouds more towards inland, and it does rain more inland

Answer:

A

Explanation:

There is more moisture near an area that is close to a body of water which causes humidity, which results in precipitation.

So sorry, if I'm incorrect! Good luck with your assessment :)