A base is a substance that has the tendency to release OH- ions. These ions then attract protons to form water.
For example:
NaOH is a strong base which dissociates into Na+ and OH- ions.
NaOH → Na+ + OH-
The OH- ions can then grab the H+ ions from water, thereby reducing the hydrogen ion concentration and increasing the pH
Ans :
When a base is added to water, hydrogen ions decrease.
The answer is decrease.
According to most scientists, cold fusion will not be a practical source of energy on Earth. Option 1 is correct.
Cold fusion is a hypothetical type of nuclear fusion that would occur at or near room temperature. If it were possible to achieve cold fusion, it would be a virtually unlimited source of energy. However, there is no scientific consensus that cold fusion is actually possible, and there have been many failed attempts to reproduce the results of early experiments.
Most scientists believe that cold fusion will not be a practical source of energy is that it would require very high pressures and temperatures to initiate the fusion reaction. These conditions are difficult to achieve and maintain in a laboratory setting, and it is not clear how they could be scaled up to a commercial level.
Another problem with cold fusion is that it would likely be very expensive to produce. The materials and equipment needed to create the high pressures and temperatures would be very costly, and the energy output would probably be relatively low. Option 1 is correct.
The complete question is
According to most scientists, cold fusion
1. Will not be a practical source of energy on Earth
2. Would be a practical source of energy on Earth if it were less expensive
3. Will be a practical source of energy on Earth within the next few decades
4. Will always continue to be a practical source of energy on Earth
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will not be a practical source of energy on Earth
A.) Element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table.
B.) Element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table.
C.) Element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons.
D.) Element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.
Answer: Option (D) is the correct answer.
Explanation:
Valence shell is the shell present on the outermost core of an atom and electrons present in the valence shell are known as valence electrons.
If an atom has completely filled valence shell then it means the atom is not reactive in nature because it is already stable.
But when an atom has less than eight electrons in its valence shell then it means to attain stability the atom will readily attract electrons towards itself.
As the given element 1 has 8 electrons in its valence shell. Hence, it is not reactive in nature but element 2 has 6 valence electrons. So, in order to attain stability element 2 will readily attract 2 electrons from a donor atom.
Thus, we can conclude that element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.
Answer:
Its D
Explanation:
I got it right on the test
bacteria-like
B.
arcahebacteria-like
C.
animal-like
D.
virus-like
B) coffee is a weak acid while drain cleaner is a strong acid
C) oven cleaner is a weak acid while battery acid is a strong acid
D) soft drinking water is a weak base while soapy water is a strong base
According to the pH scale, baking soda is a weak base while bleach is a strong base. Therefore, option (A) is correct.
An acid is any substance that is capable of donating a proton to another substance. A base is a molecule or ion that is capable to accept a hydrogen ion from an acid.
Acidic substances are generally identified by their sour taste. An acid is commonly a molecule that can donate an H⁺ ion and can be energetically favorable after a loss of H⁺ ion. Acids are also known to turn blue litmus paper into the red.
Bases are characterized by a bitter taste and a slippery texture. A base t can dissolve in water is also referred as an alkali. When bases chemically react with acids, they yield salts and water as products. Bases are also known to turn red litmus paper into the blue.
The pH value of the acids lies between 0 to 7 and the pH value of the acids lies between 7 to 14. Baking soda is a weak base that has a pH value of around 8 to 9 and bleach is a strong base that has a pH value of around 13.
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Answer:
the answer is a
Explanation: