Charge is measured in coulombs, C. The charge of an electron is 1.6 x 10 -19 C. In other words, it takes 6,250,000,000,000,000,000 electrons to make up 1 coulomb of charge. A coulomb of charge is just a very large group of electrons….The relationship between current I and quantity of charge Q.
Q. What is Q in electric current?
The amount of charge is given the symbol Q and is measured in units of coulombs (C). The quantity of charge (or electricity) contained in a current running for a specified time can be calculated: Q = I × t. Q = quantity of charge (electricity) in coulombs (C) I = current in amperes (amps, A) t = time (seconds)
Q. What does current equal to?
There is a basic equation in electrical engineering that states how the three terms relate. It says that the current is equal to the voltage divided by the resistance or I = V/R. This is known as Ohm’s law.
| I = | I = Q ÷ t |
|---|---|
| t = | t = Q ÷ I |
Q. Is charge the same as current?
The most significant difference between the charge and the current is that the charge is the physical property of matter, whereas the current is the rate of flow of charges.
Q. Why does zinc have a 2+ charge?
Zinc has an electron configuration of [Ar] 3d10 4s2. This small amount of electrons means it is more likely to lose the 2 electrons rather than taking on any in a reaction. Losing all the electrons on the fourth shell would mean Zn lost two negative charges, making it the ion Zn+2.
Q. Why do transition metals not have valence electrons?
The transition elements are unique in that they can have an incomplete inner subshell allowing valence electrons in a shell other than the outer shell. Other elements only have valence electrons in their outer shell. This allows transition metals to form several different oxidation states.
Q. Why is it called a transition metal?
The transition metals were given their name because they had a place between Group 2A (now Group 2) and Group 3A (now Group 13) in the main group elements. Therefore, in order to get from calcium to gallium in the Periodic Table, you had to transition your way through the first row of the d block (Sc → Zn).
Q. Why are D block elements called transitions?
The d-block elements are called transition elements because they exhibit transitional behaviour between s-block and p-block elements. Their properties are transitional between highly reactive metallic elements of s-block which are ionic in nature and the elements of p-block which are covalent in nature.
