Moving electric charge

 An electric charge moving with a uniform velocity produces both an electric field and a magnetic field, but it does not radiate energy as electromagnetic waves. The constant motion of the charge effectively acts as an electric current, which generates the magnetic field in its surrounding space. 

When an electric charge accelerates, it produces an electric field, a magnetic field, and radiates energy in the form of electromagnetic waves (such as light, X-rays, or radio waves). 

Here is exactly what happens when a charge speeds up, slows down, or changes direction:

Key Effects of an Accelerating Charge

• 🔊 Electromagnetic Radiation: The acceleration creates a disturbance in the surrounding electric and magnetic fields. This disturbance detaches from the charge and travels through space as an electromagnetic wave, carrying energy away. 
• ⚡ Changing Electric Field: The electric field lines bend and kink because the change in velocity takes time to propagate through space. 
• 🧲 Changing Magnetic Field: A changing electric field generates a changing magnetic field, sustaining the self-propagating electromagnetic wave.

Electrolysis

 

Key Components of Electrolysis

Electrolyte: A liquid, molten ionic compound, or aqueous solution that contains free-moving ions to carry the electric current.
Cathode: The negative electrode where positive ions (cations) gain electrons in a reduction reaction.
Anode: The positive electrode where negative ions (anions) lose electrons in an oxidation reaction.


How the Process Works
Ion Movement: Opposites attract, so positive ions move to the cathode and negative ions move to the anode.
Electron Transfer: The power source forces electrons into the cathode and pulls them away from the anode.
Non-Spontaneous Reaction: Electricity drives a chemical change that would not happen on its own.

47000 has 2 significant figures while 47000.000 has 8 significant figures...why? when both are the same value.

 

Significant figures refer to the digits in a measured or calculated value that carry meaningful information about its precision. 

They include all digits known with certainty based on the measuring tool, plus the very first estimated (uncertain) digit i.e. rounded digit. 

Understanding Certainty and Estimation

When measuring, for instance, a table length with a standard centimeter ruler, you might observe that it lands between 15.2 cm and 15.3 cm.

You know for sure it is 15 cm.

You visually estimate the last decimal place, guessing it falls about halfway, reporting 15.25 cm.

In this measurement, 1, 5, and 2 are completely certain, while the 5 is an estimate. All four are your significant figures. 

what happens to the hydrogen gas that is bubbled in SHE

 

electronegativity vs reduction potential

 

Periodic trends in electronegativity

 

Periodic trends in reduction potentials