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With reference to the X rays, which of the following statements is/are correct? X-rays are produced effectively when electrons strike the dense metal cathode. Select the correct answer using the given under. This reactivity is as a end result of high electronegativity and excessive efficient nuclear charge. Small quantities of fluoride are used in water and toothpaste to help stop tooth decay. Fluorine is taken into account some of the reactive parts in existence.
Salt is a general time period for a steel and nonmetal mixture; there are many totally different salts. The chlorine have to be separated by a membrane from the opposite true or false: the only predictable thing about a drug is that it will make you sick. electrode, which produces sodium hydroxide. Thus it’s ironic that they’re “next door” to the Group eight noble gases, the least reactive among the elements. Noble Gases The Group 18 elements are the noble gases.
Astatine might be described as probably the most rare element on the Earth. All isotopes, atoms with the same number of protons in the nucleus and totally different numbers of neutrons, are radioactive; even its name is Greek for unstable. When an atom decays its nucleus breaks into smaller atoms, subatomic particles, and vitality.
All of the halogens have a high electronegativity, but it decreases as you progress down the column. In reality, fluorine has the highest electronegativity of any factor. They have one less electron configuration than a noble gasoline, so that they require only one extra valence electron acquire an octet. The alkali metals, present in group 1 of the periodic desk , are so reactive that they’re generally present in nature combined with other elements. The alkali metals are shiny, soft, highly reactive metals at commonplace temperature and stress. This makes them very reactive as they seek to finish their outermost shell of eight electrons.
However, it, as properly as fluorine, should be handled with care as a outcome of it causes painful pores and skin burns that heal very slowly. Astatine is radioactive and is considered one of the rarest of the chemical components. Group 7 of the periodic table of elements, together with fluorine, chlorine, bromine, iodine, and astatine.