What Makes Up 90% Of The Universe’s Atoms

What makes up 90% of the universe’s atoms?

The material universe depends on hydrogen, which makes up an estimated 90% of all atoms in the universe today. The majority of the atoms in our bodies—nearly two thirds—are hydrogen, so that includes us. A human hair is approximately one million carbon atoms wide. Around 1 trillion atoms make up an average human cell.According to estimates, hydrogen makes up 93 percent of all atoms in the universe, with helium making up the vast majority of the remaining atoms. Calculate the proportion of hydrogen in the universe’s mass based only on these two elements.In summary, for a typical human of 70 kg, there are almost 7*1027 atoms (that’s a 7 followed by 27 zeros! Another way of saying this is seven billion billion billion. The percentages of hydrogen, oxygen, and carbon are roughly 2:1, 1/4, and 10%, respectively.

How many atoms make up a human being?

Until you see how many atoms there are in your body, it is difficult to comprehend how tiny they are. Around 7,000,000,000,000,000,000,000,000,000 (7 octillion) atoms make up an adult. Complex molecules, which compose cells, are composed of atoms. Scientists estimate that an average human cell has 100 trillion atoms. We can calculate the average number of atoms in a human’s red blood cells using multiplication, which comes to about 2.

How many atoms do galaxies contain?

Between 100 and 400 billion stars make up our galaxy, the Milky Way. Our galaxy contains approximately (1 point 2 1056) (2 1011) = 2 point 4 1067 atoms if we take this to be 200 billion or 2 1011 stars, and if we assume that the size of our sun is reasonable on average. The observable universe contains as many as 200 billion galaxies and, overall, as many as an estimated 1×1024 stars (more stars than all the grains of sand on planet Earth). Typical galaxies range in size from dwarfs with just ten million stars (107) to giants with one trillion (1012) stars.Our home galaxy, the Milky Way, contains at least 100 billion stars, and the observable universe contains at least 100 billion galaxies. There would be 10 trillion billion billion (or 10 sextillion) stars in the observable universe if galaxies were all of the same size.With the best available technology, the most straightforward calculation would indicate that there are 170 billion galaxies in the universe. But we know more than that, and our modern estimate is even grander: two trillion galaxies.Accordingly, there may be up to two billion Earth-sized planets in the Milky Way galaxy alone. If all galaxies have a similar number of such planets, there may be up to 100 quintillion Earth-like planets in the 50 billion galaxies in the observable universe.

How many atoms make up a piece of DNA?

Five atoms—carbon, nitrogen, oxygen, phosphorous, and hydrogen—make up the fundamental building blocks of DNA. A nucleoside is the combination of these atoms into two structures, a five- carbon sugar molecule called deoxyribose, which is responsible for the name of DNA, and a phosphate group. The four nucleotides that make up DNA are adenine (A), thymine (T), guanine (G), and cytosine (C). The two DNA strands are connected by base pairs, which are formed when the nucleotides (A with T and G with C) bind to one another.