Dowling paper also known as the “dao ling paper," was originally produced by the United States Dowling (Dowling), which is a kind of more advanced paper. The wood is the raw material of Dowling paper. According to the paper whether have luster or not, it is divided into rough dowling paper and smooth dowling paper. The formal name of Dowling paper is glazed paper or glazed printing paper, which is a special paper for glazed printing and also suitable for letterpress printing. Glazed printing paper is suitable for printing and making Monochrome or polychromatic book covers, more advanced text and the insert or pictures (such as various medical journals - China social medical journal), all kinds of colorful illustrated, map paper, Commercial paper or public welfare propaganda, color trademark and all kinds of packaging paper and so on. The glazed printing paper technology is complex, so the requirement of paper quality of printing paper is high. Glazed printing paper is made by bleached chemical pulp, bamboo pulp, rag and straw pulp and it is also needed to add some padding (Talcum powder, clay,) and mucilage (chemical agent such as surface sizing agent ). It is made on the long wire paper machine, and calender , finally form paper into storage.<span>
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Your Question: There are two kinds of elements that didn't appear on the periodic table until after 1892. What kinds are they and why do you think it took so long to discover them?
The Answer: Moseley’s analysis enabled chemists to refine the table further and reveal more gaps, which suggested that there were more new elements waiting to be discovered, with atomic numbers 43, 61, 72 and 75. Scientists subsequently found these elements—now known as technetium, promethium, hafnium and rhenium, respectively.
Explanation: Physicist Henry Moseley discovered the atomic number of each element using x-rays, which led to more accurate organization of the periodic table. We will cover his life and discovery of the relationship between atomic number and x-ray frequency, known as Moseley's Law.
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Answer:
A
Explanation:
Since macroscopic means visible to the naked eye without a microscope it would be A. This is because we can see active phase changes in real time without any magnification like water boiling or ice melting.
Answer: 10,452 degrees
Explanation: the temperature will rise as more methane is added
2 resonance structure.
O=S⁺-O⁻ and O⁻-S⁺=O, angles between S and O are 120°, bond order is 1,5.
