What is the primary reason why ionization energy decreases down a group? On the periodic table, first ionization energy generally decreases as you move down a group. This is because the outermost electron is, on average, farther from the nucleus, meaning it is held less tightly and requires less energy to remove. What properties of […]
What are the 4 components of language?
What are the 4 components of language? These include morphology, syntax, semantics, pragmatics and phonology. Morphology is the study of word structure. It describes how words are formed out of more basic elements of language called morphemes. A morpheme is the smallest meaningful unit of a language. What are the 5 levels of language? Phonetics, […]
What is the half-life of radium-223?
What is the half-life of radium-223? Radium-223, with a physical half-life of 11.4 d, emits a high linear transfer (LET) alpha radiation with a range in tissue of less than 100 μm. What are the side effects of radium 223? The side effects of radium 223 can include diarrhoea and sickness but these are generally […]
What is the result of stream erosion?
What is the result of stream erosion? Erosion by Streams Flowing streams pick up and transport weathered materials by eroding sediments from their banks. Streams also carry ions and ionic compounds that dissolve easily in the water. Sediments are carried as the following loads: dissolved, suspended, and bed. What is the long term result of […]
Why do both bumper cars stop after crash?
Why do both bumper cars stop after crash? If kinetic energy before is the same as after, then the collision is elastic. Interactions between molecules are examples of perfectly elastic collisions. If two bumper cars collide head-on in a fairground and both cars come to a stop due to the collision, kinetic energy is obviously […]
Does sound travel faster in darkness?
Does sound travel faster in darkness? You may wonder, it is because it is quieter at night than in the daytime. Actually, sound transmits farther at night may be related to refraction of sound waves! First, sound is the vibration of air, and it is a kind of wave motion. The propagation of sound wave […]
Can a balloon make it to space?
Can a balloon make it to space? A helium-filled balloon can float very high up into the atmosphere, however, it cannot float up into outer space. The balloon can only rise up until the atmosphere surrounding it has the same weight as the helium in the balloon. This happens at about a height of 20 […]
Why does pressure increase with altitude?
Why does pressure increase with altitude? At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels. Since most of the atmosphere’s molecules are held close to the earth’s surface by the force of gravity, air pressure decreases rapidly at first, then more slowly at higher levels. […]
What is the second stage of man?
What are the disadvantages of modern periodic table?
What are the disadvantages of modern periodic table? What are the disadvantages of modern periodic table? Position of hydrogen is not satisfactory, it can be placed either in group I or 17 group of the first period. It fails to accommodate lathanides and actinides in the main body of the periodic table. These are kept […]