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4. Which of the following elements does not want to have eight valence electrons? a. magnesium c. hydrogen b. oxygen d. nitrogen
Answer:
Hydrogen.
Explanation:
Hydrogen is the simplest chemical element that exists. The symbol for the chemical element Hydrogen is "H" and it is a colourless, tasteless, odorless, and highly flammable gas.
Hydrogen is a chemical element found in group (1) of the periodic table and as such it has one (1) electrons in its outermost shell. Therefore, Hydrogen has an atomic number of one (1) and a single valence electrons because it has only one proton and one electron in its nucleus.
Based on the octet rule which states that atoms of chemical elements gain, lose or share electrons so as to have eight (8) electrons in their valence shell. Therefore, atoms of chemical elements bond in order to attain the electronic configuration of a noble gas i.e a full valence shell which comprises of eight (8) electrons.
However, the chemical element "Hydrogen" is an exception to the octet rule because it is only able to hold a maximum of two (2) valence electrons in its outermost shell to become full.
Hence, Hydrogen is an element which does not want to have eight valence electrons.
In the control group, how did the number of grass blades change over the three week period?
In the experimental group, how did the number of grass blades change over the three week period?
Was there a measureable difference in the number of grass blades between the control group and the experimental group at the end of three weeks?
Answer:
decreased
decreased
yes
Explanation:
edge
Answer:
decreased
decreased
yes
Explanation:
How would the rabbits be affected if the owls disappeared from this ecosystem
Answer: the rabbit population would increase because the owls food are rabbits and if there is no one to eat rabbits then there would be a significant increase in the amount of rabbits.
Which atoms have a higher electronegativity?
Ocean salinity varies from place to place due to differing conditions in the environment
-true
-false
Ocean salinity varies from place to place due to differing conditions in the environment is a true statement.
How ocean salinity varies?It is not evenly distributed, but it does change temporarily and spatially with the oceans and seas.
This variation is both horizontally and vertically distributed; horizontal distribution refers to salinity changes at the ocean's surface level and vertical distribution, to salinity changes as the ocean's depth.
Several variables influence ocean salinity. They are global warming, evaporation, rainfall, river water input, ocean currents, atmospheric pressure, and wind direction. Oceans and seas have a 35 average salinity.
Therefore, It is not evenly distributed, although it does change momentarily and spatially with the oceans and seas.
Learn more about ocean, here:
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Chloroplasts would be found in which eukaryotic organisms?
.oak tree
.blue-green algae
.raccoon
.cricket
Answer:
oak tree
Explanation:
because the others aren't plants
What is Rodenticide?
A) A medicine to kill worms
B) A medicine to kill animals
C) A lubricant
D) A pesticide
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[tex]{\fcolorbox{red}{black}{\orange{AnsWer}}}[/tex]
[tex]\underline\bold\green{A \:pesticide.}[/tex]
How do tree grows in the forest without
human interference? Explain.
Answer:
Trees in the forest do not compete with grass for water and nutrients. Heavy equipment and other land uses are not present to contribute to soil compaction. The natural cycle of falling leaves and other natural waste decompose into fertilizer for plant and tree life. The forest floor is soft which allows easy penetration of life supporting elements.
The answer is very simple. Trees in the forest are not competing with grass for water and nutrients. Heavy equipment and other land uses are not available to contribute to soil compaction. The natural cycle of falling leaves and other natural waste is decomposed into fertilizer for plant and tree life. The forest floor is soft, allowing easy penetration of life supporting elements. In today's world, trees are being removed from their natural habitat and planted in newly developed residential or commercial sites. With soil compaction and grass competing, countless hours are spent trying to preserve nature in unnatural settings. Irrigation, aeration, soil modification are all necessary to help maintain a healthy root system. Strong healthy root systems make it easier for a tree to cope with pest, disease, and temporary drought. This is why you should be sure to call a qualified experienced arborist or consultant to diagnose and help you with your urban tree problems.
Which of the following is NOT a cartilage we find in the body?
Dense cartilage
Hyaline cartilage
Fibrocartilage
Elastie cartilage
Choose the correct words to complete the sentences.
Human melanocytes are a type of cell found in skin, ear, eye and other
tissues. They are (Choose...)
cells, meaning they have a
nucleus. Melanocytes spend most of their time in
(Choose...), during which they produce the pigment
melanin. Cell division is regulated in part by genes such as
CDKN2A, which produce regulatory (Choose...) If this
gene is damaged, the cell may begin dividing uncontrollably, a
condition called
(Choose...)
Answer:
Choose the correct words to complete the sentences.
Human melanocytes are a type of cell found in skin, ear, eye and other
tissues. They are (Choose...)
cells, meaning they have a
nucleus. Melanocytes spend most of their time in
(Choose...), during which they produce the pigment
melanin. Cell division is regulated in part by genes such as
CDKN2A, which produce regulatory (Choose...) If this
gene is damaged, the cell may begin dividing uncontrollably, a
condition called
(Choose...)
Explanation:
The correct words that completed the sentences are:
EukaryoticInterphaseProteinsCancerWhat do you mean by Human melanocytes cells?Human melanocytes are specialized skin cells that produce a skin pigment called melanin. They are responsible for giving skin its color.
Human melanocytes are a type of cell found in the skin, ear, eye, and other tissues. They are eukaryotic cells, meaning they have a nucleus. Melanocytes spend most of their time in interphase, during which they produce the pigment melanin. Cell division is regulated in part by genes such as CDKN2A, which produce regulatory proteins. If this gene is damaged, the cell may begin dividing uncontrollably, a condition called cancer.
Therefore, the correct words are completely filled in specific sentences.
To learn more about Human Melanocytes cells, refer to the link;
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Explain to your client at the water purification plant what the cause of the increased number of bacteria in the water is. Make sure to include the evidence you used to reach your conclusions. Your response should include a minimum of five complete sentences.
Answer:
Water purification, process by which undesired chemical compounds, organic and inorganic materials, and biological contaminants are removed from water. Water purification provides clean drinking water and supplies treated water for domestic, industrial, medical, and pharmacological uses.
Explanation:
searched online
How would extra carbon dioxide
in a lake be removed?

Answer:
Carbon dioxide in a lake can be removed by chemical treatment using liming agents such as sodium carbonate or hydrated lime and quicklime. These liming agents react with carbon dioxide and reduces carbon dioxide and increases the pH and alkanity of the lake
Explanation:
Which geographic features are associated with a divergent boundary
Answer:
divergent pulls away so the features that are included would be pulling away.
Explanation:
What is true regarding all 11 body systems?
Answer:
it's all in our body
Explanation:
good lessons !!!!
Answer:
What are the 11 human body systems and their functions?
The main systems of the human body are:
Circulatory system / Cardiovascular system: ...
Digestive system and Excretory system: ...
Endocrine system: ...
Integumentary system / Exocrine system: ...
Immune system and lymphatic system: ...
Muscular system: ...
Nervous system: ...
Renal system and Urinary system.
How are meiosis and mitosis different?
Answer:
Meiosis is a type of cell division that results in the formation of four daughter cells each with half the number of chromosomes as the parent cell. on the other hand Mitosis is the type of cell division that results in the formation of two daughter cells each with the same number and kind of chromosomes as the parent cell. hope this helps a bit
Explanation:
THIS IS SCIENCE PLEASE HELP
what is a ecosystem?
Its is something that girl is my dream pet two
Explanation:
What’s the difference between meiosis and mitosis
Answer:
Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells.
Explanation:
Answer:
Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells. Below we highlight the keys differences and similarities between the two types of cell division
:)
Describe how you are involved in both the carbon and oxygen cycles
Plants use carbon dioxide in a process known as photosynthesis. During photosynthesis, plants give off oxygen as a waste product. Carbon dioxide moves from the air into the leaves of plants through tiny openings in the plant's leaves. Oxygen moves out of the plant leaf through these same openings.
Answer:
Plants take in carbon dioxide, and turn it into oxygen. Animals breathe in that oxygen and breathe out carbon dioxide. So with out one or the other, there would be an imbalance of oxygen and carbon dioxide and nothing would be able to survive.
describe how water moves from the soil to the leaves in a tree
Answer:
bgt
Explanation:
compare the composition of lymph with that of blood plasma in the following two situations:
(a) Lymph that has just left a lymph node.
(b) Lymph formed in the vicinity of the small intestine.
please help asap
please help me at least one of the question
Answer:
Lymphatic vessels and ducts provide the complex transportation network of the lymphatic system. These vessels carry a fluid called lymph away from body tissues and capillary beds to be filtered by nodes and organs, then returned to the bloodstream.
Explanation:
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Describe the difference between codominance and incomplete dominance. Give 1 example of each.
describe how water moves from the soil to the leaves in a tree
Answer:
Cohesion/adhesion
Explanation:
Water is passively transported into the roots and then into the xylem. The forces of cohesion and adhesion cause the water molecules to form a column in the xylem. Water moves from the xylem into the mesophyll cells, evaporates from their surfaces and leaves the plant by diffusion through the stomata.
How much water would have to be displaced for the Lucia to float?
What are the stages of meiosis in eukaryotic cells with realizing that there are two cell divisions involved?
Answer:
Meiosis can only occur in eukaryotic organisms. It is preceded by interphase, specifically the G phase of interphase. Both Meiosis I and II have the same number and arrangement of phases: prophase, metaphase, anaphase, and telophase. Both produce two daughter cells from each parent cell.
What makes stars produce enrgy
Answer:
Stars produce energy from nuclear reactions
the reaction occurs when hydrogen and helium fuse toghther.
Explanation:
Answer:
Stars make energy through nuclear fusion
Explanation:
what characteristics are used to distinguish between the organisms in different kingdoms
Answer:
Explanation:
The six Kingdoms are: Archaebacteria, Eubacteria, Fungi, Protista, Plants and Animals. -Organisms are placed into these categories based on similarities or common characteristics. Some of the characteristics that are used to determine placement are cell type, nutrient acquisition, and reproduction.
What type of blood specimen requires collecting in an evacuated tube that does not have an anticoagulant additive ?
Answer:
Red. The red bottle is less common – it is used for biochemistry tests requiring …
Yellow. Additive: anticoagulant SPS (Sodium Polyanetholsulfonate) & ACD (acid …
Light Blue. The blue bottle is used for haematology tests involving the clotting …
Green. This less commonly used bottle is for biochemistry tests which require …
Explanation: