Which substance is an Arrhenius acid
Answers
Explanation:
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An Arrhenius acid is a substance that, when dissolved, forms stainless hydrogen (H +)
An Arrhenius base is a substance that when dissolved produces oxhydryl ions (OH-).
For example:
hydrochloric acid: HCl
Nitric Acid: HNO3
Final answer:
An Arrhenius acid is a substance that releases hydrogen ions when dissolved in water. Examples can range from strong acids, like hydrochloric acid, to weak acids like vinegar. The concept was formulated by Svante Arrhenius, underlining the importance of hydrogen in the definition of acids.
Explanation:
An Arrhenius acid is specifically defined as a substance which, when dissolved in water, releases hydrogen ions (or protons). This includes strong acids like hydrochloric acid (HCl), which releases all of their hydrogen ions in solution, thereby becoming completely ionized. However, this also includes weak acids like vinegar, or acetic acid, which do not ionize completely and still leave some hydrogen ions within the compound.
These properties of acids were formulated by Svante Arrhenius in the late 19th century, underlining the importance of hydrogen in defining acids. The ability of acids to release hydrogen cations led to their definition as acid substances.
Thus, if a substance releases hydrogen ions into a solution when dissolved in water, it can be described as an Arrhenius acid.
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(3) The first ionization energy decreases and the electronegativity increases.
(4) The first ionization energy increases and the electronegativity decreases.
Answers
Reason:
As we move from top to bottom in a periodic table, atomic radius increases. Also, effective nuclear charge decreases. Due to this, energy required to remove the electron form valance shell decreases. Hence, ionization energy decreases from top to bottom.
In addition to this, metallic character increases from top to bottom. Metals have low electronegativity as compared to non-metals. Hence, electronegativilty value decreases from top to bottom.
The correct statement regarding the first ionization energy and electronegativity values in group 15 is as follows:
Further Explanation:
The amount of energy needed for the removal of the most loosely bound electron from a neutral isolated gaseous atom is termed as ionization energy, represented by IE. It depends on the ease of electron removal from the neutral atoms. If the electrons are removed easily, ionization energy will be less and vice-versa.
Ionization energy is called the first ionization energy when the first electron is removed from the atom. It is shown by . Similarly, if the second electron is removed, ionization energy becomes the second ionization energy
.
The tendency of any element for electron attraction towards itself in a chemical bond is known as electronegativity. More the attracting tendency of the atom for electron, higher will be its electronegativity and vice-versa.
Atomic number and number of shells increase while going down group 15. Due to this, atomic size increases in the group from top to bottom. This increase in size results in weaker attractions between the outermost electrons and the atomic nucleus. So electrons are removed easily and therefore the first ionization energy decreases down this group.
Since atomic size increases from top to bottom of group 15, the attraction between the atomic nucleus and the electrons decreases. Therefore electronegativity also decreases down this group.
Therefore both the first ionization energy and electronegativity decrease down group 15.
Learn more:
- Rank the elements according to first ionization energy: brainly.com/question/1550767
- Arrange the following elements from greatest to least tendency to accept an electron: brainly.com/question/2107660
Answer details:
Grade: Senior School
Chapter: Periodic classification of elements
Subject: Chemistry
Keywords: ionization energy, first ionization energy, electronegativity, attraction, group 15, decrease.
c. temperature
b. appearance
d. melting point
Answers
Why is (A) the answer?
When we look into the chemical definition of Composition, it says that it all refers to the way the atoms are arranged or of the type of the atoms in molecules of chemical substances.
The chemical composition varies (which also means it changes) when other chemical changes happen/occur in chemicals.
And as well we are making a total new substance when we give it a change chemically.
So in conclusion, a chemical change is a change in the COMPOSITION of a substance
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Answer: With a positively charged nucleus.
Explanation:
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Answer: Ocean surface wind
Explanation: Ocean surface wind are generated in the ocean due to the abrasion or rubbing between the prevailing wind and the surface waves. They are formed at the top of the ocean surface.
When the wind is very strong, it generates surface waves of bigger wavelength and bigger height. But at the bottom, the waves moves at a slower rate. This waves are formed due to the wind.
This waves can rise upto hundreds of feets during tsunamis. Thus, this waves breaks as they reach the shoreline.