dessssimartinez6780
12.06.2020 •
English
Decide where each element belongs in the essay then sort it into the correct category
Solved
Show answers
More tips
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
- T Travel and tourism Maldives Adventures: What is the Best Season to Visit the Luxurious Beaches?...
- H Health and Medicine Kinesiology: What is it and How Does it Work?...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
Answers on questions: English
- E English We are stimulated to emotional response not by works that confirm our sense of the world, but by works that challenge it.” 1. What does the word stimulated” mean? 2. What...
- E English Write a letter to a friend or family member you might be concerned about. Address these areas: Concerns about their well being Stress level Self Estccm Self Concept How would...
- E English Read the sentence. Which statement best describes this sentence? Over the course of one s lifetime, we can expect to eat an average of seventy insects. The pronoun we does...
- E English 1.you must remove shoes at security 2.the police have arrested one of the drivers3.the local council gave the land to the company 4.we wont need money in the future 5.people...
- E English How do i write/techniques for a powerful/convincing persuasive essay?...
- E English Ateenage boy falls in love with a girl from a different gang. their parents don t want them to be together, so they hide their relationship from everyone. arguments between...
- E English engage in research to better understand the condition you selected. consult these resources about conducting effective research: • starting research • evaluating sources e...
- E English According to your textbook, occurs when the speech as a whole is ethical but the speaker fails to give credit for particular quotations and paraphrases....
- E English The white house has been home to many animals as well as presidents. (1 point) (0 pts) common noun (1 pt) proper noun (0 pts) compound noun (0 pts) collective noun...
- E English Letter that sounds like an expression of relief...
Ответ:
In chemistry an element is a species of atom having the same number of protons in its atomic nuclei (that is, the same atomic number, or Z).[1] For example, the atomic number of oxygen is 8, so the element oxygen describes all atoms which have 8 protons.
In total, 118 elements have been identified. The first 94 occur naturally on Earth, and the remaining 24 are synthetic elements. There are 80 elements that have at least one stable isotope and 38 that have exclusively radionuclides, which decay over time into other elements. Iron is the most abundant element (by mass) making up Earth, while oxygen is the most common element in the Earth's crust.[2]
Chemical elements constitute all of the ordinary matter of the universe. However, astronomical observations suggest that ordinary observable matter makes up only about 15% of the matter in the universe. The remainder is dark matter; the composition of this is unknown, but it is not composed of chemical elements.[3] The two lightest elements, hydrogen and helium, were mostly formed in the Big Bang and are the most common elements in the universe. The next three elements (lithium, beryllium and boron) were formed mostly by cosmic ray spallation and are thus rarer than heavier elements. Formation of elements with 6 to 26 protons occurs in main sequence stars via stellar nucleosynthesis. The high abundance of oxygen, silicon, and iron on Earth reflects their common production in such stars. Elements with greater than 26 protons are formed by nucleosynthesis in supernovae, which, when they explode, blast these elements as supernova remnants far into space, where they may become incorporated into planets when they are formed.[4]
The term "element" is used for atoms with a given number of protons (regardless of whether or not they are ionized or chemically bonded, e.g. hydrogen in water) as well as for a pure chemical substance consisting of a single element (e.g. hydrogen gas).[1] For the second meaning, the terms "elementary substance" and "simple substance" have been suggested, but they have not gained much acceptance in English chemical literature, whereas in some other languages their equivalent is widely used (e.g. French corps simple, Russian простое вещество). A single element can form multiple substances differing in their structure; they are called allotropes of the element.
When different elements are chemically combined, with the atoms held together by chemical bonds, they form chemical compounds. Only a minority of elements are found uncombined as relatively pure minerals. Among the more common of such native elements are copper, silver, gold, carbon (as coal, graphite, or diamonds), and sulfur. All but a few of the most inert elements, such as noble gases and noble metals, are usually found on Earth in chemically combined form, as chemical compounds. While about 32 of the chemical elements occur on Earth in native uncombined forms, most of these occur as mixtures. For example, atmospheric air is primarily a mixture of nitrogen, oxygen, and argon, and native solid elements occur in alloys, such as that of iron and nickel.
The history of the discovery and use of the elements began with primitive human societies that found native elements like carbon, sulfur, copper and gold (though the status of these materials as elements was not known at the time). Later civilizations extracted elemental copper, tin, lead and iron from their ores by smelting, using charcoal. Alchemists and chemists subsequently identified many more; all of the naturally occurring elements were known by 1950.
The properties of the chemical elements are summarized in the periodic table, which organizes the elements by increasing atomic number into rows ("periods") in which the columns ("groups") share recurring ("periodic") physical and chemical properties. Save for unstable radioactive elements with short half-lives, all of the elements are available industrially, most of them in low degrees of impurities.
Ответ:
answer:
i don't know
explanation: