Answer:
Oxygen
Explanation:
The electrons present in an atom are arranged in shells or orbitals. The electrons are filled into these shells based on their energy levels with those shells closest to the nucleus filled first as they have the lowest energies.
The arrangement of electrons around the nucleus of an atom is known as electronic configuration. The outermost electron shell of an atom is known as a valence shell shell and the electrons found in this shell are known as valence electrons. The electrons usually exist in pairs. The first shell can only contain two electrons; the second shell can contain 8. the electrons are singly filled first before pairing occurs.
The electronic configuration of the atoms of the elements in the option are as follows:
Helium : 1s² ; valence electrons are 2 which are both paired
Hydrogen: 1s¹ ; valence electron is 1
Oxygen : 1s²2s²2p⁴ ; valence electrons are 6 wit two unpaired electrons
Lithium : 1s²2s¹ ; valence electron is 1
Helium has two valence electrons but they are paired as its 1s shell can only contain a maximum of two electrons.
Oxygen has 6 valence electrons. Two of these electrons are paired while the other two are unpaired.
What is the molecular weight of 1 mole of NaCl where the atomic mass of Na = 23 and Cl = 35.4?
Which process connects glycolysis and the citric acid cycle?
A. lactic acid formation
B. acetyl CoA formation
C.electron transport
D. Krebs cycle
Answer: the answer is B
Explanation: i lied lolololloloolollololol
Which model represents the Law of Conservation of Mass?
A conveyer belt moves a 40 kg box at a velocity of 2 m/s. What is the kinetic energy of the box while it is on the conveyor belt?
Bart has to babysit Maggie for several nights in a row during summer vacation and makes a bet with that Taylor Swift music will get Maggie to Bart gets out the CD collection and when Maggie cries the first night, he plays The second time he plays /DC and rocks out, but she doesn't stop crying. The third time he plays Taylor Swift. When he plays Taylor Swift, Maggie immediately and starts to smile. •What is the independent variable? •What is the hypothesis? •What is the dependent variable? •Milhouse says Bart needs to try to see what Maggie will do if he doenst play any music At all. What is this called?
Answer:
Independent variable: THE TYPE OF MUSIC PLAYED
Dependent variable: MAGGIE'S TEARS
Hypothesis: IF Taylor Swift's music is played, THEN Maggie will stop crying
Control group
Explanation:
The hypothesis of an experiment is a testable explanation given to possibly solve an observed problem. In this question, Maggie thinks Taylor Swift's music will get Maggie to stop crying, hence, one can hypothesize that: IF Taylor Swift's music is played, THEN Maggie will stop crying
Independent variable is the variable that the experimenter manipulates or changes in order to bring about an outcome. The independent variable in this experiment is the THE TYPE OF MUSIC PLAYED by Bart because it is what is changed.
Dependent variable is the variable that is being measured. It responds to the changes made to the independent variable. In this experiment, the dependent variable is MAGGIE'S TEARS.
Milhouse says Bart needs to try to see what Maggie will do if he doenst play any music At all, this is called the CONTROL GROUP because the control group of an experiment is the group that does not receive any experimental treatment i.e. the independent variable is not added.
Which type of feed is typically fed to baby chicks?
crumbles
mash
pellets
scratch
Sue has Parkinson's disease. She takes medication that increases the level of
Answer:
Sue has Parkinson's disease. She takes medication that increases the level of dopamine.
Explanation:
most embrassing moments do youhave
Answer:
I was going up on the stairs to my class room , when I fell infront of my class mates.
It was really embarrassing
The island of Hawaii experiences volcanism because it is located
O above a hot spot
O above an active mid-oceanic ridge
O along a transform fault
O a site where 2 plates are colliding
above a subduction zone
Answer:
Scientists believe that the reason Hawaii has so many volcanoes is because it is located above a hot spot that is suspected to start at earths liquid core.
Explanation:
How are soil and plant taxonomy the same
Each word describes the creatures in a tropical rainforests, except:
A. Numerous
B. Uniform
C. Biodiverse
D. Adapted
Why can’t animals be autotroph
Answer:
They can't get energy or food from the sun. They must hunt for their food.
Explanation:
What happens to hydrogen bonds when water turns to ice?
Answer:
at temperatures low enough to turn off the disruptive effects of thermal motions, water freezes into ice in which the hydrogen bonds form a rigid and stable network.
Explanation:
Notice that the hydrogen bond (shown by the dashed green line) is somewhat longer than the covalent O—H bond.
unique physical features of pigeon
Answer:
There are many unique physical features that pigeons have.
Explanation:
Pigeons, according to studies, are surprisingly complex creatures. They have passed the "mirror test"(self recognition), can recognize others, and can recognize every letter of the human alphabet.
There are also incredible physical features.
Plumage is one of these. Their plumage varies, and is unique to the type of pigeon they are. Not only this, but they have the ability to walk, while most other birds hop about.
Something absolutely extraordinary about them is that they have a gland in their throat. That gland actually secretes milk for their offspring, so they have adequate nutrition to grow and develop.
Hope this helps.
Jim wants to study the distribution, movement, and quality of water on Earth. Which field of study does it refer to?
is the scientific study of the distribution, movement and quality of water on Earth
Answer:
Hydrology
Explanation:
Hydrology is the scientific study of the movement, distribution, and management of water on Earth and other planets, including the water cycle, water resources, and environmental watershed sustainability.
HELP ASAP!!!
Which group of elements are present in all macromolecules in living things? (8.9A)
C, H, P, N
C, H, O
Na, CI, O
OS S. P, C, O
Answer: the answer is C,H,O
Explanation:Option B is correct
Answer:
c,h ,o
Explanation:
Which of the following is not part of the circulatory system? Group of answer choices Heart lungs Blood Vessels Blood
Explanation:
Lungs is not a part of circulatory system as it is the part of respiratory system.
(MICROSCOPES) "If the total magnification is 40x. The eyepiece is 10x, what is the power of the objective lens?"
PLEASE HELP! ILL GIVE 5 STARS.
Answer: the answer should be 400x
Explanation: duh
what is the amino acid responsible for increasing bone length
Answer:
alanine, arginine, glutamic acid, glycine, and proline—may play a role in bone health, principally through improved production of insulin and insulin‐like growth factor 1 and the synthesis of collagen and muscle protein
Explanation:
A mineral crystallizes from magma deep inside Earth.
Which characteristics can be determined given only the information above?
O luster
streak
O crystal size
O crystal structure
Answer:
It's crystal size.
Explanation:
The magma in the earth isn't cooling yet, the slower the cooling, the larger the crystals,
Pls, mark brainliest
From the given information the crystal size can be determined. The crystal size can be studies from the crystallization and cooling rate of magma.
What are minerals?Minerals are inorganic solids that exist in nature and have a distinct chemical composition and crystalline structure. Even though thousands of minerals in the earth have been found, only ten minerals such as quartz, orthoclase, pyroxene, calcite, biotite, garnet, clay etc. make up the majority of the crust's volume.
Mineral rock have to property of lustering such as polished metals and they reflect the light in color. The color of the powder of the crystalline mineral is called streak.
As the magma cools, the size of crystal becomes large. It is proved that from the cooling rate of magma, the crystallization and crystal size can be determined.
Hence, crystal size can be determined from the given information and option C is correct.
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How does genetic variation within a species increase the chance of survival in a species in a changing environment? explain and provide an example
Pls need help the question is up there already giving BRAINLEST to a good answer
Answer:
The last choice. Think of planets, the bigger they are, the stronger they attract to one another
Explanation:
hope it helps
The functional connectivity is greatest for which pair of species?
Wood frogs and Spotted salamanders
O Black bears and wood frogs
O White-tailed deer and Pickerel frogs
O Spotted salamanders and Black bears
O Grizzly bears and White-tailed deer
Answer:
White-tailed deer and Pickerel frogs
Explanation:
When someone challenges your opinion, you should ___________________. A. repeat your opinion again until they are convinced. B. acknowledge their opinion and make sure you have a valid argument to respond with. If you do not have a valid argument, you may be in the wrong. C. ignore them, their opinion doesn’t matter when you have already formed your own opinion. D. accept their opinion as correct, especially if they have a degree.
Opinions are the views formed concerning something. When an opinion is challenged, then one should acknowledge them and ensure that a valid argument is presented in the counterclaim. Thus, option B is correct.
What is a counterclaim?A counterclaim is a rebuttal made against the claim made previously and is the response of an individual to the presented opinions or judgments. It is generally presented to clear and oppose the ideas claimed by the opposition.
If an idea of a person is challenged then the person can respond by presenting a reasonable argument that can validate the ideas and opinions as true and accurate rather than getting them as incorrect.
If a valid argument is not presented then there might be a possibility that the ideas and opinions presented were not true or correct.
Therefore, one should acknowledge other people's opinions by providing a valid argument.
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Read this description of the life cycle of a mushroom. 1. A mushroom begins to grow underground as a single-celled "spore.” 2. The spore grows into multicellular structures called "hyphae.” 3. The hyphae absorb nutrition and detect when conditions are right to sprout a mushroom above ground. 4. The sprouted mushroom then forms new spores that can enter the ground and begin the life cycle again. Which sentence about this life cycle shows that mushrooms need energy and respond to stimuli? A: A mushroom begins to grow underground as a single-celled “spore.” B: The spore grows into multicellular structures called “hyphae.” C: The hyphae absorb nutrition and detect when conditions are right to sprout a mushroom above ground. D: The sprouted mushroom then forms new spores that can enter the ground and begin the life cycle again
Answer:
youranswerisletterbbcauseThesporegrowsintomulticellularstructures calledhyphaemakesthemostsence
Explanation: :D Im Happy to help
Answer:
C
Explanation:
How many neutrons are The process of fusion and fission are completely different. Fusion combines two light atoms together and fission splits the nucleus of a large unstable atom. What is the MAJOR similarity between the two? in the isotope Carbon-14?
Answer:
Examples of fission and fusion
For example, the so-called hydrogen bomb (or H bomb) is actually a deuterium–tritium bomb (a D–T bomb), which uses a nuclear fission reaction to create the very high temperatures needed to initiate fusion of solid lithium deuteride (6LiD), which releases neutrons that then react with 6Li, producing tritium.
Explanation:
What do you think will be the biggest
space mission of the twenty-first century?
Answer:
going to all the other plants to try to find life form
When a liquid changes to a gas the process is called?
Answer:
Condensation
Explanation:
the word is called condensation
true or false Geoengineering will have no negative effects on the environment.
It is false that geoengineering will have no negative effects on the environment.
What is geoengineering ?Geoengineering, also known as Climate Engineering, is the deliberate, extensive modification of the Earth's environment and climate in order to stop further climate change, halt and stop global warming, and lessen the effects on human society and the ecosystem.
Spraying compounds into the atmosphere to create reflecting aerosols and reflect sunlight into space is known as solar geoengineering. Although this would prevent global temperatures from rising, local or regional temperatures may still rise over the coming years, according to a recent study.
Hence, it is false that geoengineering will have no negative effects on the environment.
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What is a real-life example of genetic drift?
A real-life example of genetic drift - The Afrikaner (Dutch) population
Genetic driftan unpredictable change in the gene poolit usually limits diversity as some alleles are either eliminated or expressed too much.there are two forms of genetic drift founder effect and bottleneck effectA real-life example of genetic drift is -The Afrikaner (Dutch) population that settled in South Africa had an abnormally high count of Huntington's Diseaseit is due to the first Dutch settlers had a high frequency of the gene than the original populationLearn more:
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