Sentences with phrase «chemical elements»
The phrase "chemical elements" refers to the basic building blocks of matter. They are different types of substances that cannot be broken down into simpler substances. Each element has a unique name and symbol, like oxygen (O) or hydrogen (H). There are about 118 known elements, which combine to form everything around us, such as water, air, and minerals. Elements are the fundamental components that make up all the stuff in the universe. Full definition
By looking at how concentrations of chemical elements in the sediment change with depth, the researchers can develop a continuous record of how much surface runoff poured into the lake.
sciencedaily.com
First, the origin of many heavy chemical elements in the universe, including gold and platinum, has long been a puzzle.
These observations may help solve another long - standing question in astronomy: the origin of heavy chemical elements, like gold and platinum [5].
While mostly copper, the blade contains small concentrations of lead, arsenic, silver and more than a dozen other chemical elements.
That periodic table poster on your wall is about to be out of date, thanks to four new chemical elements that just received official recognition.
Salt companies learned long ago that they could make a profit by selling the various chemical elements separately.
For each star, this DNA is the amount they contain of each of nearly two dozen chemical elements such as oxygen, aluminium, and iron.
Then there is a group of tests that analyzes the concentration of chemical elements like calcium, phosphorus, sodium, potassium and chloride in the blood.
Because it turned out you need less of that stuff — that particular chemical element.
As galaxies age, some of their basic chemical elements can also show signs of aging.
The table lists the most abundant chemical elements; it represents an average pertaining to all cosmic objects in general.
The new results come from a catalog of more than 150,000 stars; for each star, it includes the amount of each of almost two dozen chemical elements.
Salt companies learned long ago that they could make a profit by selling the various chemical elements separately.
In its pure form as it is mined, nickel is a metallic chemical element and is located amongst transitional metals when referenced on the periodic table of elements.
A chemical compound is a chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition.
The gamma - ray energy spectrum identifies individual chemical elements.
Certain chemical elements have more than one type of atom.
It moves huge amounts of water, heat, salt, carbon, nutrients, and other chemical elements around.
This suggests that the fish were exposed to chemical elements in the first fish farm that was researched.
The human body is a composition of chemical elements that we find elsewhere in nature.
Such objects are the main source of very heavy chemical elements like gold and platinum.
Each line indicates a particular chemical element or molecule, with the line strength indicating the abundance of that element.
Isotopes are variants of the same chemical element with different atomic weights due to having different numbers of neutrons, such as the most common carbon isotope, carbon - 12, and a heavier stable isotope, carbon - 13.
Importantly, the method works even for chemical elements present at very low concentrations, some of which are particularly useful for unveiling magma history with unprecedented detail.
neodymium A chemical element which appears as a soft, silvery metal when it is pure.
This new finding fills in a long - missing piece in the puzzle representing our galaxy's chemical evolution, and is a big step forward for astronomers trying to understand the amounts of different chemical elements in stars in the Milky Way.
As another example, if the relationship between the strengths of the gravitational force and the electromagnetic force were not close to what it is, then the cosmos would not harbor any stars that explode and spew out life - supporting chemical elements into space or any other stars that form planets.
She explains: «Phosphorus is one of just six chemical elements on which Earth organisms depend, and it is crucial to the compound adenosine triphosphate (ATP), which cells use to store and transfer energy.
The light chemical element lithium is one of the few elements that is predicted to have been created by the Big Bang, 13.8 billion years ago.
All the heavier chemical elements essential to life — including oxygen, nitrogen, carbon and iron — were forged in the bellies of stars.
Stars and galaxies 12.9 billion light - years away contain chemical elements heavier than hydrogen, helium, lithium — and nickel.
These lakes, that would be located deep in Europa's icy crust, could be communicating with the liquid water ocean below, while providing it with chemical elements from the surface that would be a valuable energy source to any potential life forms.
REEs are a series of chemical elements found in the Earth's crust that are widely used because of their special properties.
Clay minerals that form where the ratio of water interacting with rock is small generally retain the same chemical elements as those found in the original volcanic rocks later altered by the water.
When they erupt, the stars spew out their guts, seeding the cosmos with chemical elements necessary for life to exist.
However, «the CT scan didn't show the outline of the nervous systems unambiguously enough,» Strausfeld said, «while a scanning laser technique mapping the distribution of chemical elements showed iron deposits outlining the nervous system almost as convincingly but with minor differences.»
The instrument, which zaps a painting with x-rays, allows researchers to see what chemical elements — lead, cadmium, iron — are present in different parts of the painting, not only at the surface, but also in deeper layers.
The origins of the periodic table lie in the 19th century, when chemists noticed that patterns began to emerge among the known chemical elements when they were organised by increasing atomic weight.
These enhanced capabilities will allow scientists to observe the gas squeezed within galaxy clusters, determining its composition, motion, and turbulence, all for a better understanding of how chemical elements evolved within the universe and what role interstellar gases play in star and galaxy formation.
The Temagami Banded Iron Formation, which was formed 2.7 billion years ago during the Neoarchean period, can be used as an archive because the isotopic composition of many chemical elements such as Hafnium and Neodymium directly mirrors the composition of Neoarchean seawater.
The heavy chemical elements required for life (carbon, oxygen, nitrogen, phosphorous, and so forth) took several billion years of cooking time at the heart of stars before supernovas eventually dispersed them throughout space.
A big bang would have produced only hydrogen, helium, and lithium — the three lightest chemical elements.
europium A rare chemical element that appears as a silver metal when it is pure.
Instead of listing the 118 chemical elements by their atomic numbers from # 1, hydrogen to # 118, oganesson, it shows 20 calendar years» worth of investment returns (1998 through 2017 for the recently published 2018 edition) for 10 different asset classes, including both U.S. and international stocks as well as domestic bonds.
Because here, it is called the galactic habitable zone and contains just the right concentrations of chemical elements needed to support life as well being away from dangerous radiation.
Because of the diversity of matter, which is mostly composed of different combinations of atoms, chemists often study how atoms of different chemical elements interact to form molecules and how molecules interact with each other.
The first generation should contain only hydrogen, helium, and a trace of lithium — the only chemical elements a big bang could produce.