What does the number 84 in krypton-84 represent

A.the sum of protons and electrons.
B.the mass number.
C.the atomic number
D.twice the protons.

Answers

Answer 1
B. The mass number, also known as the atomic weight/atomic mass

Related Questions

Type the correct answer in the box. Spell all words correctly.

What is Teddy's organization trying to accomplish?

Teddy is working for a nonprofit organization that urges people to stop using products with CFCs. Through this Initiative, Teddy's organization

hopes to reduce the concentration of

in the atmosphere.

Answers

Answer:

Greenhouse gases

Explanation:

Teddy is working for a nonprofit organization that urges people to stop using products with CFCs. Through this Initiative, Teddy's organization hopes to reduce the concentration of greenhouse gases in the atmosphere.

Greenhouse gases deplete the ozone layer thereby causing global warming as a result often increase in the intensity of Sun rays reaching the earth.

Example of greenhouse gases include chlorofluorocarbon, nitrogen, water vapor etc

Which statement best describes the function of nucleic acids?
A. Stores genetic information and helps to make proteins
B. Increases the rate of chemical reactions
C. Stimulates metabolism in all body cells
D
Activates secretion of the body's hormones

Answers

Answer:

A. stores genetic info and helps make proteins.

Explanation:

Nucleic acids are DNA and RNA.

The statement that best describes the function of nucleic acid is stored genetic information and helps to make proteins. The correct option is A.

What is nucleic acid?

Nucleic acid is a macromolecule. Nucleic acid is made up of nucleotides. The composition of nucleotides is a 5-carbon sugar, a phosphate group, and a nitrogenous base.

Nucleic acid is the main component of the genetic material of the living organism. They are DNA and RNA. DNA is the main genetic material of animals and plants, and RNA is found in some bacteria and some plants.

DNA and RNA store the genetic information of the organism. As this, nucleic acid also contains genetic material. This genetic information is used in synthesizing proteins.

Thus, the correct option is A. Stores genetic information and helps to make proteins.

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FAST PLEASE!!!!!!!! IM BEING TIMED HELP!!!!!! BRAINLYEST

Caused by differences in the density of ocean water; flows slowly.


Gulf Stream


deep current


surface current

Answers

Answer:

it is either B or C but probably C

Describe the structure and function of the cell membrane.

Answers

Answer:

The cell membrane, therefore, has two functions: first, to be a barrier keeping the constituents of the cell in and unwanted substances out and, second, to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.

Explanation:

How is radar used to forecast weather?

It shows areas of high and low pressure.
It collects data in the upper atmosphere.
It collects weather data as part of a network around the country.
It locates and tracks storms, and follows the path of storm systems.

Answers

Answer:

D. It locates and tracks storms, and follows the path of storm systems.

Explanation:

It's correct on Edge 2021

Radar is used to forecast weather through the following:

By locating and tracking stormsFollowing the path of storm systems.

What is a Radar?

Thus involves the use of radio waves to determine the distance, angle, or relative velocity of objects.

This is why it is used locating and tracking storms, and following the path of storm systems during weather forecasts,

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Select all of the following that are a result of heating up a solution?
Molecules will move faster
Molecules will slow down
Molecular movement will not change
More collisions will occur between molecules

Answers

Answer:

a

Explanation:

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.

The results of heating up a solution are:

Molecules will move faster

More collisions will occur between molecules

According to the kinetic molecular theory, when a solution is heated up:

The temperature of the solution risesThe attractive forces binding the molecules weakensThe speed of the molecules increases. This means that the molecules  move faster than before The rate of collision between the molecules increases. This is because of an increase in the Kinetic Energy possessed by the molecules as the temperature rises

Therefore, among the given options, the results of heating up a solution are:

Molecules will move faster

More collisions will occur between molecules

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Where do Earth’s convection currents occur?

A the lithosphere
B tectonic plates
C the asthenosphere
D the subduction zone

Answers

Answer:

B

Explanation:

B

Another students says that the earth’s magnetic poles have flipped many times in the past. How would you evaluate their statement?

Question 18 options:

This is a true statement.


This false because the magnetic field is fixed and cannot change.


This is false because a compass always points at the true North Pole.


This is false because the magnetic field has only flipped once.

Answers

Answer:

True

Explanation:

As a matter of geological record, the Earth's magnetic field has undergone numerous reversals of polarity. We can see this in the magnetic patterns found in volcanic rocks, especially those recovered from the ocean floors. In the last 10 million years, there have been, on average, 4 or 5 reversals per million years.

To increase efficiency of cell processes, cells have adapted to do which two things?

Answers

Answer:

divide and develop organelles

Explanation:

Sucrose is made of which simple sugars?
glucose and fructose
fructose and galactose
galactose and cellulose
cellulose and glucose

Answers

Answer:

it is made of

glucose and fructose.

Sucrose is made up of simple sugars glucose and fructose. Thus, the correct option is A.

What are Simple sugars?

Simple sugars may be defined as carbohydrates in their most basic form. Such types of carbohydrates contain only one to two sugar molecules and are digested quickly.

Monosaccharides and disaccharides are examples of simple sugars. Examples of simple sugars are glucose, fructose, and galactose.

Therefore, Sucrose is made up of simple sugars glucose and fructose. Thus, the correct option is A.

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please help jdixnwjdj

Answers

Answer: Homeostasis

Explanation: One way that a cell maintains homeostasis is by controlling the movement of substances across the cell membrane. The lipid bilayer is selectively permeable to small, nonpolar substances. Proteins in the cell membrane include cell-surface markers, receptor proteins, enzymes, and transport proteins.

Enzymes speed up chemical reactions. Which statement correctly identifies the function of the enzymes involved in DNA replication?
A: Helicase adds hydrogen bonds to the template strand DNA polymerase breaks nitrogen bases
B: Helicase adds nitrogen bases to the template strand, DNA polymerase breaks hydrogen bonds
I
C : Helicase breaks nitrogen bases in the template strand. DNA polymerase adds hydrogen bonds
D : Helicase breaks hydrogen bonds in the template strand DNA polymerase adds nitrogen bases

Answers

Answer:

D: Helicase breaks hydrogen bonds in the template strand, DNA polymerase adds nitrogen bases

Explanation:

DNA replication is the process whereby DNA content is duplicated. This process of DNA replication is carried out with the aid of certain enzymes. Two of those important enzymes as stated in this question are DNA Helicase and DNA polymerase.

- DNA Helicase is the enzyme that breaks the hydrogen bonds that holds the two DNA strands in the molecule together. This separates the double-stranded DNA into two single strands.

- DNA polymerase is another enzyme that which carries out the nucleotide synthesis. DNA adds nitrogen bases to the new DNA strand based on what it reads on the DNA template

PLS HELP!!!!!!
A ____ reaction is the change that takes place when two or more substances interact to form new substances.

Answers

Answer:

I think its chemical.

Explanation:

SORRY IF WRONG!! :(

Answer:

Chemical

Explanation:Give the precious smol bean the brainliest they deserve.

what is the antonym of misuse​

Answers

Answer:

To Cherish or Save something or to Care for something or benefit

Explanation:

Answer:

Use is the answer.

I hope it helps

Thank U

do you think a hand-crank flashlight would be a good energy system for the rescue workers? Why or why not?

Answers

Answer:

No.

Explanation:

No, hand-crank flashlight would not be a good energy system for the rescue workers because the light turns on by applying muscle force on the hand-crank flashlight and after that, the device convert muscle force into electric energy and the light turns on and we know that the rescue worker have a tough job which requires both hands so this hand-crank flashlight is not useful to him.


Identify the organelles in the cell to the right

Answers

Answer: A-Vacoule

B-Chloroplast

C-cell membrane

D-Golgi apparatus

E-Endoplasmic reticulum

F-Cell wall

Explanation:

Answer:

dentify the organelles in the cell to the right.

A

✔ vacuole

B

✔ chloroplast

C

✔ cell membrane

D

✔ Golgi apparatus

E

✔ endoplasmic reticulum

F

✔ cell wall

The organelles in a plant cell are labeled. Part A is a large hollow structure at the center of the cell. Part B is a leaf-shaped structure. Part C is the lining of the cell. Part D is made up of stacked circles. Part E is a network of membranous tubules. Part F is the outside of the cell.

Explanation:

a)shrink
b)swell
c)neither ​

Answers

The correct answer is B

I’m snapdragons flower color is controlled by incomplete dominance...

Answers

I think you asking this. Heterozygous?

Observing a human tissue sample under a microscope would be an example of what division of anatomical study?

Answers

Answer:  Histology is the study of the microscopic anatomy of cells and tissues of plants and animals. It is performed by examining a thin slice (section) of tissue under a light microscope or electron microscope.

Explanation:

what system sends "electrical" signals around your body

Answers

Answer:

The nervous system is a complex network of nervous tissue that carries electrical messages throughout the body. It includes the brain and spinal cord.

Answer:



Humans have two types of communication systems. These are the nervous system and the endocrine (hormone) system. These systems regulate body processes through chemical and electrical signals that pass between cells

What cellular process is occurring in the organelle labeled A?
(5 Points)
Students constructed a diagram to represent two related cellular processes.

F. Photosynthesis
G. Cellular respiration
H. DNA replication
J. Protein synthesis

Answers

Answer:

F. Photosynthesis

Explanation:

The organelle pictured (a chloroplast) seems to be absorbing energy from the sunlight and that is included in the process of photosynthesis.

The carbohydrates (glucose) are formed by the process of photosynthesis in the chloroplast of the cell which then sent to the mitochondria for the production of ATP through glycolysis. Thus, the correct option is F.

What is Photosynthesis?

Photosynthesis is the process of conversion of light energy (sunlight) into chemical energy (glucose). This process takes place in the chloroplast of plant cell where chlorophyll is present, this pigment (chlorophyll) is responsible for trapping the sunlight which is responsible for conduction of photosynthesis.

The products of photosynthesis (glucose) is sent to the mitochondria of cell for the production of ATP by the process of glycolysis. This ATP is then utilized by the cell in other cellular mechanisms.

Therefore, the correct option is F.

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In the atmosphere, 50% of the air lies below an altitude of

Answers

Answer:

it is 89.0000655

Explanation:

bn hn hhhbnhh h kjjhjn nh

In the atmosphere, 50% of the air lies below an altitude of 89.0000655.

What do you mean by altitude of atmosphere?

Exosphere. Located between about 700 and 10,000 kilometers (440 and 6,200 miles) above Earth's surface, the exosphere is the highest layer of Earth's atmosphere and, at its top, merges with the solar wind.

The commonly accepted end of earth's atmosphere falls within the thermosphere at 62 miles (100 kilometers) above the earth's surface. This commonly accepted boundary is called the Kármán Line.

The Stratosphere extends around 31 miles (50 km) down to anywhere from 4 to 12 miles (6 to 20 km) above the Earth's surface. This layer holds 19 percent of the atmosphere's gases but very little water vapor.

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Which element is more difficult to take electrons away from tin or Gallium and why ?

Answers

In particular, cesium (Cs) can give up its valence electron more easily than can lithium (Li). In fact, for the alkali metals (the elements in Group 1), the ease of giving up an electron varies as follows: Cs > Rb > K > Na > Li with Cs the most likely, and Li the least likely, to lose an electron.

Cesium (Cs) in particular can surrender its valence electron quite conveniently than lithium (Li). In fact, the ease with which the alkali metals give up an electron varies as follows: > Cs > Rb > K > Na Li is the most likely to lose an electron, followed by Cs and Li.

What is reactivity?

In chemistry, reactivity is the impulse that causes a chemical substance to undergo a chemical reaction, either on its own or in conjunction with other materials, resulting in the release of energy.

The reactivity of an element is a measure of how easily it will combine with other elements to form substances.

The number of electrons in an atom's outermost shell determines its reactivity. Noble gases have low reactivity so even though their electron shells are complete.

Cesium (Cs) in particular can more easily surrender its valence electron than lithium (Li).

In fact, the alkali metals' ability to give up an electron varies as follows: > Cs > Rb > K > Na Li has the highest probability of losing an electron, followed by Cs and Li.

Thus, these are some elements that is more difficult to take electrons away from tin or Gallium.

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Which of the following is true concerning pastoralism?
a.
It occurs in small areas of land with high yields.
b.
It occurs in forests and grasslands.
c.
It is a modern agricultural technique.
d.
It revolves around herding livestock.


Please select the best answer from the choices provided

A
B
C
D

Answers

Answer:

D

Explanation:

Answer:

It revolves around herding of livestock

Endoplasmic reticulum the Golgi apparatus, vacuoles, and lysosomes in a eukaryotic cell are made up of mostly what?

Answers

Answer:

Glucose (I think)

Explanation:

Aphids are tiny insects that feed on plants. Ladybugs are helpful to plants because they eat aphids.

Which type of organism are aphids in this scenario?

decomposers
predators
prey
producers

Answers

Answer:

Prey

Explanation:

The aphids are the prey of the ladybug.

Answer:

c

Explanation:

food contains several components called as?

Answers

Answer:

These components are called nutrients. The major nutrients in our food are named carbohydrates, proteins, fats, vitamins and minerals. In addition, food contains dietary fibers and water which are also needed by our body.

Explanation:

In addition to liquid precipitation, which are present when freezing rain occurs. Choose one.
- Warm temperatures
- Cold surfaces
- Ice pellets
- Snowflakes

Answers

Answer:

Warm Temperature

Explanation:

Answer:

i think its A sorry if im wrong

Explanation:

24. Why is pure water neutral?
a, more hydronium than hydroxide
b. equal numbers of hydronium and hydroxide
c. more hydroxide than hydronium
d. none of the above

Answers

C.
explanation- in the case of pure water there are always going to be the same number of hydrogen ions and hydroxide ions present.

Answer:

B

Explanation:

help pls help pls question is above ​

Answers

It is eitheir b or d

I’m pretty sure it is B
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It looked bad.My dad struggled to straighten the wire. He was having a very hard time. The fence needed a lot of work. Dad stood up, brushed the snow from his pants and walked back to the truck. A gust of wind entered the truck as he climbed in."Can you fix the fence?" I asked my dad as he settled in the truck."I think so," he said. "But it's too dark to fix now and I need my tools and more wood." I thought he might tell me more."It will be a big job. It isn't right that you have to fix it all by yourself when some one else crashed through it and ruined it," I said.My dad looked at me and smiled. "I think someone will come forward and admit to hitting the fence," he said.When we arrived at home, dad made me hot chocolate. I sat at the table in the kitchen and sipped my drink slowly as I listened to the wind howling outside.Thirty minutes later, as we cleaned up our hot chocolate, light shown across our lawn and into our kitchen. Dad and I looked outside to see who was there. As I looked outside, I noticed the car in the driveway only had one headlight. The car stopped and the driver walked through the snow, towards our front door."Are you Mr. Smith?" the stranger asked when dad opened the door."Yes," Dad answered. "How can I help you?""Well, sir, my name is Tom Jones. I want to apologize for running into your fence this morning." Mr. Jones went on the explain he had been driving home from work and hit an icy patch and slid off of the road. He apologized again and promised he would help my dad fix the fence. He wrote down his name, address, and phone number on a piece of paper. He gave the paper to my dad. He shook my dad's hand and left.Dad smiled as he closed the door. Dad could see I was surprised that someone had come to tell the truth. "Dad, how did you know someone would come and tell you about the fence?" I asked.Dad said, "Well, I know I would have done the right thing, and I know you would have done the right thing. 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