Which of the following elements is stable? A. Boron, atomic number 5
B. Neon, atomic number 10
C. Fluorine, atomic number 9
D. Carbon, atomic number 6
Answers
Answer: Option (B) is the correct answer.
Explanation:
An atom is stable when it has completely filled orbitals. This means that K shell have 2 electrons, L shell have 8 electrons, M shell have 18 electrons and so on.
Therefore, electronic distribution of given elements will be as follows.
Boron has electronic configuration 2, 3.
Neon has electronic configuration 2, 8.
Fluorine has electronic configuration 2, 7.
Carbon has electronic configuration 2, 4.
Therefore, out of the given elements neon is stable.
The element that is stable among the options given is B. Neon, with atomic number 10.
Which is stable element?
Stability in the context of elements refers to having a filled outer electron shell, typically with eight electrons, known as an octet. Neon, a noble gas, has a complete octet with two electrons in the first shell and eight electrons in the second shell.
In contrast, elements like Boron (atomic number 5), Fluorine (atomic number 9), and Carbon (atomic number 6) do not have a complete octet in their outermost electron shells. They tend to form chemical bonds and engage in chemical reactions to achieve a stable electron configuration. Option B
Learn more about element at brainly.com/question/20096027
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Answers
nerves
B.
brain
C.
spinal cord
D.
eye
Answers
Answer:
The correct answer is option A, that is, nerves.
Explanation:
The nerves are also known as neurons that make up the nervous system. The nerves are considered as the unique cells, which conduct messages from one section of the body to another, as minute electrical signals. These messages are also called nerve impulses. There are three distinct kinds of neurons known, and each one exhibit a somewhat different function. These are relay neurons, sensory neurons, and motor neurons.
Answers
light
touch
sound
Answers
A dog may become frightened and cower when it hears loud thunder. This is an example of a reaction to sound stimuli. Therefore, option D is correct.
What do you mean by stimuli ?
Stimuli are changes in the internal or external environment that can be detected. That which influences or causes an increase in physiological activity or response in the entire organism or any of its parts.
Touch and pain are examples of external stimuli, as are vision, smell, taste, sound, and balance. External changes activate these sensory stimuli. Pain and touch: Pain is a stimulus that can elicit a significant response from the body. Pain can also alter an organism's behavior.
A dog may become frightened and cower when it hears loud thunder. This is an example of a reaction to sound stimuli because dogs have excellent hearing so when it hears loud thunder it was a frightened reaction.
Thus, option D is correct.
To learn more about the stimuli, follow the link;
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Answers
Every organic molecules/compound contains carbon (c).
Some other very abundant are hydrogen, nitrogen, oxygen, phosphorus, and sulfur.
I learned this with the acronym CHNOPS.
C - Carbon
H - Hydrogen
N - Nitrogen
O - Oxygen
P - Phosphorus
S - Sulfur
Hope this helps!
Answer: The elements which are common for all organic molecules is hydrogen and carbon.
Explanation:
Another name for organic molecules are hydrocarbons. This means that the molecules which consist of hydrogen and carbon atoms is an organic compound.
For Example:
are not organic compounds, because in water, carbon is not there and in carbon dioxide, hydrogen is not there. But,
is an organic compound because hydrogen and carbon both are present.
Hence, hydrogen and carbon elements are common to all organic molecules.
research
intuition
Answers
Answer:
The given blank can be filled with research.
Explanation:
The procedure of looking for facts, which will lead to the truth is known as research. In the absence of research one cannot conclude that the facts or statements are right. Research is illustrated as a systematic and creative work performed to enhance the stock of knowledge, comprising knowledge of culture and society, humans, and the application of this knowledge stock to device novel uses.