Answer:
2s² 2p⁵
There are seven valance electrons in fluorine.
Explanation:
The elements of group 17 are called halogens. These are six elements Fluorine, Chlorine, Bromine, Iodine, Astatine. Halogens are very reactive these elements can not be found free in nature. Their chemical properties are resemble greatly with each other.
Properties of fluorine:
1. it is yellow in color.
2. it is flammable gas.
3. it is highly corrosive.
4. fluorine has pungent smell.
5. its reactions with all other elements are very vigorous except neon, oxygen, krypton and helium.
Electronic configuration of fluorine:
F₉ = 1s² 2s² 2p⁵
Valance electrons in fluorine are 2s² 2p⁵.
Valance Orbital configuration:
2s² 2p⁵
There are seven valance electrons in fluorine.
Answer:
The energy of the photon is 1.718×10−26J.
Explanation:
The energy of the photon is
1.718 × 10 − 26J. You use the formula E =, where h is Planck's Constant,c is the speed of light, and λ is the wavelength of the photon.
E== = 1.718×10−26J.
Answer:
All the processes given involves the conversion of potential energy to kinetic energy
Explanation:
The kinetic energy is the energy possessed by an object because of its motion, equal to one half the body's mass times the square of its speed.
i.e
On the other hand, The potential energy is the energy possessed by an object because of its position in a gravitational or electric field, or its condition as a stretched or compressed spring, as a chemical reactant,or by having rest mass.
SO, from both definitions :
Water cascades downward in a waterfall → involves the conversion of potential energy to kinetic energy
A player kicks a football → involves the conversion of potential energy to kinetic energy
An electric current is generated by a chemical reaction in a battery. → involves the conversion of potential energy to kinetic energy
Water boils when heated on a gas stove. → involves the conversion of potential energy to kinetic energy
Answer:
Promethium
Pm 61
Discovered by Jacob .A. Marinsky