When additional 5 grams of NaCl are dissolved in solution the conductivity of solution increases as more ions are available for conduction.
An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.
Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with the oppositely charged ions resulting in neutral molecules.
Learn more about ions,here:
For light 3 to function, switch D does not have to be on. This diagram shows a parallel circuit that provides more than one way for the current to return to the power source.
The molecules get closer together and move more slowly.
from a gas to a liquid, the atoms or molecules of the substance do not change. Instead, the motion of the atoms or molecules in the substance determines its state of matter.
gas condenses to form a liquid, the molecules get closer together and move more slowly. If the molecules continue to slow down until they move so slowly that they can only vibrate against one another, then the substance becomes a solid.
It is a warm air mass over a continent describes an air mass with symbol cT.
An air mass is a sizable portion of the atmosphere that has a largely constant temperature and moisture content. Air masses can travel thousands of kilometers in either direction and can extend up to 16 km (10 mi) into the atmosphere, or the stratosphere.
Large, uniformly-cooled and humid surfaces are known as source zones where air masses form. Low wind speeds allow air to remain still for an extended period of time and absorb the characteristics of the source region, such as heat or cold.
The weather characteristics of this air mass depend on how long of a sea track it takes to travel from Europe to the British Isles. Because this air is naturally very cold and dry, if it travels only a short distance over.
Therefore, It is a warm air mass over a continent describes an air mass with symbol cT.
To learn more about air mass, refer to the link:
B) Warm air mass over a continent
cT means Tropical c= continent
Answer:1.80 x 10^24
Option D: The trend for first ionization energy.
Electronegativity is defined as tendency of an atom of element to attract electron pair towards itself. On moving left to right in a period, electronegativity increases due to increase in nuclear charge and on moving top to bottom in a group, it decreases due to increase of distance between nucleus and outermost shell.
Shielding decreases with increase in electronegativity. If the nuclear charge gets shielded by inner electrons, outer electrons will experience less nuclear charge and the tendency of an atom to attract electron/s decreases or electronegativity decreases. Thus, electronegativity trends can not be similar to the trends of shielding. Option A is wrong.
Ionic radius is defined as distance between the nucleus and outermost shell of an ion (charged atom) and atomic radius is distance between the nucleus and outermost shell of an atom. On moving left to right in a period, atomic and ionic radius decreases because nuclear charge increases and it pulls the outer electrons more towards itself resulting decrease in size. Similarly, on moving top to bottom in a group, atomic and ionic radius increases due to addition of an extra period. Therefore, option B and C are wrong.
Ionization energy is the amount of energy needed to remove an electron from outer most shell of an atom. On moving left to right in a period, it increases due to increase in nuclear charge, as outer electrons are more attracted to the nucleus. On moving top to bottom, due to increase in size, ionization energy decrease because small amount of energy is required to remove the outer shell electron/s. Therefore, trends for first ionization energy are similar to electronegativity trends and option D is correct.