Answer:
In an ionic compound a metal is bonded to a nonmetal.
The element in the compound that has a positive charge is called the cation
while the element with the negative charge is called the anion.
Explanation:
In an ionic compound a metal is bonded to a nonmetal.
The element in the compound that has a positive charge is called the cation
while the element with the negative charge is called the anion.
Question: What does it mean if an element is isoelectronic?
Answer: Isoelectronic is a term to describe a group of atoms or ions having the same number of electrons
Explanation: they are both the same because they bot have the same number of protons in each atom and they both will have the same always not diffrent its gonna have the same number
question answered by
(jacemorris04)
C. one of the discoveries he made which gave him his fame in the scientific community was that the atom could not be destroyed
Answer:
- <u>2.59 × 10⁻⁷ m = 259 nm</u>
Explanation:
You need to calculate the wavelength of a photon with an energy equal to 463 kJ/mol, which is the energy to break an oxygen-hydrogen atom.
The energy of a photon and its wavelength are related by the Planck - Einstein equation:
Where:
- h = Planck constant (6.626 × 10⁻³⁴ J . s) and
- ν = frequency of the photon.
And:
Where:
- c = speed of light (3.00 × 10⁸ m/s in vacuum)
- λ = wavelength of the photon
Thus, you can derive:
Solve for λ:
Before substituting the values, convert the energy, 463 kJ/ mol, to J/bond
- 463 kJ/ mol × 1,000 J/kJ × 1 mol / 6.022 × 10 ²³ atom × 1 bond / atom
= 7.69×10²³ J / bond
Substitute the values and use the energy of one bond:
- λ = 6.626 × 10⁻³⁴ J . s × 3.00 × 10⁸ m/s / 7.69×10²³ J = 2.59 × 10⁻⁷ m
The wavelength of light is usually shown in nanometers:
- 2.59 × 10⁻⁷ m × 10⁹ nm / m = 259 nm ← answer