PH scale is used to determine how acidic or basic a solution is
pH can be calculated using the H⁺ ion concentration
pH = - log [H⁺]
and if pH is known we can find out the H⁺ ion concentration
[H⁺] = antilog(-pH)
[H⁺] = antilog(-8.95)
[H⁺] = 1.122 x 10⁻⁹ M
therefore hydrogen ion concentration is 1.122 x 10⁻⁹ M
Answer:
In a covalent bond electrons are <u>shared</u> between atoms
<em>n</em> = 15. A Bohr orbit with <em>n</em> = 15 comes closest to having a 24 nm diameter
.
The formula for the radius <em>r</em> of the <em>n</em>th orbital of a hydrogen atom is
<em>r</em> = <em>n</em>^2·<em>a</em>
where
<em>a</em> = the Bohr radius = 0.0529 nm
We can solve this equation to get
<em>n</em> = √ (<em>r</em>/<em>a</em>)
If <em>d</em> = 24 nm, <em>r</em> = 12 nm.
∴ <em>n</em> = √(12 nm/0.0529 nm) = √227 = 15.1
<em>n</em> must be an integer, so <em>n</em> = 15.
The elements in the blocks of period 4-7 and group 3-12 in the periodic table are in the d-block and d-block elements are known as transition metals or transition elements.
Arsenic is a metalloid and it has four electron shells and five valence electrons.
the s and p orbital of Arsenic have 2 and 3 electrons respectively and which makes five valence electrons.
is night i will answer you in the morning
