which element is most likely to share electrons with other atoms in joint orbitals
a) chlorine (7 valence electrons)
b) calcuim (2 valence electrons)
c) argon (8 valence electrons)
d) carbon (4 valence electrons)
e) potassium (1 valence electron)
Answer:
Carbon.
Explanation:
Covalent bonds is the chemical bonds that are formed by the mutual sharing of the electrons. The covalent bond is the strongest bond in the nature.
Carbon has the ability to form to form covalent bond. Carbon neither gains electron ( 6 protons cannot hold 10 electrons) and nor looses electron ( due to high ionization energy). So carbon forms bonds by the sharing of the electrons with the other atoms even in joint orbital.
Thus, the correct answer is option (d).
What is volume? What are the units for volume?
Cell structure quiz anwsers
Cell structure refers to the components and organization of cells, with a distinction between prokaryotic and eukaryotic cells. It includes the study of cytoplasm, cytoskeleton, nucleus, ribosomes, and mitochondria, as well as plant cell-specific structures.
The term cell structure refers to the various components that make up a cell, including its inner workings and the arrangements of its parts. Cells are the fundamental units of life, categorized broadly into prokaryotic and eukaryotic cells, with eukaryotic cells being more complex and including plant and animal cells. The study of cell structure encompasses the understanding of various cellular components, such as the cytoplasm, cytoskeleton, nucleus, ribosomes, and mitochondria, as well as the endomembrane system, which includes the endoplasmic reticulum, Golgi apparatus, and various vesicles that transport proteins and other molecules.
Additionally, specific structures within plant cells, such as chloroplasts, cell walls, and large water-filled vacuoles, distinguish them from animal cells. Studying these components helps in understanding the cell's ability to function, communicate with other cells, and maintain homeostasis. Both the structure and the function of cells are fundamental topics in high school biology.
Describe a cell which effectively uses diffusion as a means to move materials in and out. Suggest how being small helps cells survive, and being made of many small cells helps large organisms maintain homeostasis.
I don't know of any cells which effectively uses diffusion as a means to move materials in and out.
Single-celled organisms like amoebas efficiently utilize diffusion for the exchange of nutrients and waste due to their small size, which supports an adequate surface area to volume ratio. For multicellular organisms, consisting of many small cells aids in maintaining homeostasis by ensuring efficient substance exchange.
Cells that effectively use diffusion to move materials in and out include single-celled organisms like the amoeba. Due to the limiting effects of diffusion on size and development, these cells must remain small. Diffusion is an efficient process for the exchange of nutrients and waste in these cells, primarily because their small size allows for adequate distribution throughout the entire cell. As cells grow larger, the center of the cell might not receive enough nutrients or dispose of waste effectively due to the increased distance substances must travel.
Being small helps cells survive as it increases the surface area to volume ratio, which is favorable for diffusion to occur efficiently. For larger, multicellular organisms, being made of many small cells rather than fewer large cells aids in maintaining homeostasis because it ensures that all cells are close enough to the organism's external environment or to internal transport systems like blood vessels, which helps in efficient diffusion and transport of substances.
music question hurry please
Answer:
I believe the answer is mixed. sorry if I'm wrong!
What three tests must all theories pass to be considered a “proven” theory?
Is the Meadow Vole a herbivore, omnivore, carnivore, or detritivore?
Sound waves with a large distance between A and B would be sound waves that have a large ________ and produce loud sounds.
Answer:
displacement of air
Explanation:
Sound waves are mechanical waves that vibrate at a frequency of 20 to 20,000 hertz (Hz), and are normally perceptible by the human ear. Sound is the sensation we feel, through hearing through the action of this type of wave. Another important characteristic, the sound wave needs a medium to propagate, be it gas, liquid or solid. Therefore, there is no sound in a vacuum. The greater the air displacement produced by the sound wave, the louder the sound produced by it. For this reason, we can conclude that sound waves with a great distance between A and B would be sound waves with a large displacement of air and producing loud sounds.
At one time, most people believed that the Universe was static, meaning it did not change. When larger and better telescopes were invented in the early 1900s, however, it was discovered that light from objects in space shifted toward longer wavelengths. Scientists concluded that only an expanding Universe could explain this shift. Which of the following statements is supported by this example?
A. The theory of the expanding Universe cannot change, even if new evidence arises.
B. Scientific knowledge can change when new evidence or interpretations arise.
C. The principle of the expanding Universe is a scientific law.
D. Once a scientific theory has been accepted, it can never change.
Answer:
The correct answer is option B, Scientific knowledge can change when new evidence or interpretations arise.
Explanation:
The logical explanation to any scientific theory/law keeps on changing. This is so because the first logical explanation to any scientific theory was the best possible explanation to it available at that time with the limited resources and was accepted by the majority of peers. But with the advancement in technology some new theories may come forward. for example – Earlier it was found that atom in the smallest unit of matter , but with the advancement in high scale microscope it was found that even atom is made of smaller particles like electron, proton etc. Thus the scientific theories/laws get affected by new researches.
How does sensation influence our behaviours in the environment
The ability of water to hold more heat than land keeps the temperature on Earth
Which is a shared characteristic of all animals? A) they are autotrophs B) they are vertebrates C) they are invertebrates D) they are heterotrophs
The answer is D they are heterotrophs
Answer:
D) they are heterotrophs
Explanation:
All animals are heterotrophs. This means that they get the nutrients (nitrogen, carbon, etc.) and the energy they need to live through plants or other animals, since they do not have a system for the production of their food. All animals need carbon for the proper functioning of their basic processes, such as growth, development and reproduction.
why should scientific investigations be replicable
Answer:
A. To make sure data is accurate
Explanation:
Answer from Study Island
A polo player hits a ball with a mass of 0.42kg with a force of 7.35 Newtons. How does the force the polo player's mallet exerted on the ball compare to the force the ball exerted on the mallet?
Which of the following would introduce bias into an experiment? (1 point)
publishing your experimental results in a scientific journal
allowing other scientists to repeat and verify your experimental results
using a computer to record and store your data
discarding data that does not fit with your personal expectations
Which of these human body cells might be better suited to stretch and grow than the others?
A)skin cells
B)nerve cells
C)sperm cells
D)muscle cells
Animal cells contain all of the following structures EXCEPT a A) nucleus. B) cell wall. C) mitochondria. D) Golgi apparatus.
A transmission electron microscope would be the best microscope choice to study _______. a. structures smaller than cells b. single celled organisms c. plant leaves d. amphibian organs
The right answer is a. structures smaller than cells.
In the transmission electron microscope, electrons are emitted by heating a tungsten filament (or crystal of lanthanum hexaboride). These electrons are then accelerated with a voltage of between 200 and 1000 kV (1000 kV for the most expensive). Once the vacuum is in the cell, the electron beam is passed through a sample about 3 mm in diameter and less than 20 nanometers thick. Then this beam is focused with the help of magnetic lenses towards the screen or the photographic plate.
The operation of M.E.T is analogous to that of an optical microscope.
In light microscopy, a beam of photons is sent through a sample. This beam is then focused through optical lenses to the image plane of the lens. An enlarged image of the sample is observed.
Which of the following is an organic activity?
a. root-pry
b. abrasion
c. carbonation
d. exfoliation
Which of the following processes most directly helps create soil from rocks? A. melting B. plate tectonics C. pressure D. weathering
Answer:
the answer is D. weathering
Explanation:
because i just did it on study island
What are the six characteristics of living things?
what occurs after cytokinesis is completed at the end of meiosis 1
Answer:
Two haploid cells are formed.
Robert studies ocean life. He observes that a species of octopus squirts a large cloud of black ink whenever a predator approaches. Which of the following is a scientific question that Robert could ask about what he observed? A. Does a big octopus have a prettier ink cloud than a small octopus? B. Does releasing a cloud of ink make the octopus more likely to escape a predator? C. Does an octopus release a cloud of ink whenever it feels scared? D. Does a predator like the taste of an octopus more than the taste of a squid?
Answer:
Does releasing a cloud of ink make the octopus more likely to escape a predator?
Explanation:
Study island
wich statement correctly compares nucleic acids and carbohydrates
It is easy to see the cladogram represents several different types of insects. In the classification of living things, all insects belong to the kingdom Animalia
HELP ME PLEASE!!! I'LL CHOOSE A BRAINLIEST!!!!
When are lung transplants performed? What are the risks of lung transplants?
Lung transplants are performed when there are no other medical options; it is a last resort.
The recipient’s body may reject the new lung.
The transplanted lung may also become infected.
Scientists examine a newly discovered object and discover that it is, indeed, made up of smaller parts. What must the smaller parts do in order to classify the object as living?
Which career professional sets up, runs, and maintains equipment such as lights
Answer:
Video Equipment Technician
Explanation:
This is the correct response because shooting films would need good lighting and camera people use video equipment to do so.
Which of the following is not a correct equation for centripetal force?
A. Fc=mac
B. F=m v2/t
C. F=m v/r
Explanation:
When a body is moving in a circular path then a force acts on it and this force is directed towards the center around the moving object.
Mathematically, F = [tex]m\frac{v^{2}}{r}[/tex]
where F = force
m = mass
v = velocity
r = radius
The term [tex]\frac{v^{2}}{r}[/tex] is the centripetal acceleration.
Also, expression for centripetal force can be [tex]F_{c} = ma_{c}[/tex], where [tex]a_{c}[/tex] represents acceleration of centripetal force.
Whereas both the expressions F = [tex]m\frac{v^{2}}{t}[/tex] and F = [tex]m\frac{v}{r}[/tex] are not a correct equation for centripetal force.
In June, there are fewer hours of daylight and less direct in the A. Southern Hemisphere B. Northern hemisphere C. Western Hemisphere D. Eastern Hemisphere
Answer:
Southern Hemisphere
Explanation: