How did most of the chemical elements we are made out of form originally?
The low-mass elements, hydrogen and helium, were produced in the hot, dense conditions of the birth of the universe itself. The birth, life, and death of a star is described in terms of nuclear reactions. The chemical elements that make up the matter we observe throughout the universe were created in these reactions.
Why is iron the heaviest element that can be produced in stars?
After the hydrogen in the star’s core is exhausted, the star can burn helium to form progressively heavier elements, carbon and oxygen and so on, until iron and nickel are formed. Up to this point the process releases energy. The formation of elements heavier than iron and nickel requires the input of energy.
In what way scientist determine which chemical elements are formed inside stars?
To determine which chemical elements are formed inside stars, scientists use a technique known as visible spectroscopy. It is based on a device, called a spectroscope, which spreads visible light into its component colors by passing it through a prism or grating.
Where do the elements come from?
Elements and the ‘Big Bang’ theory As the cloud of cosmic dust and gases from the Big Bang cooled, stars formed, and these then grouped together to form galaxies. The other 86 elements found in nature were created in nuclear reactions in these stars and in huge stellar explosions known as supernovae.
What is the most abundant element in the universe?
Hydrogen
What element is the heaviest?
uranium
Which is the rarest element on earth?
element astatine
Which element is hardest?
carbon
Which is the lightest element in the universe?
Which is the lightest gas in the world?
What is the lightest and heaviest element?
The lightest chemical element is Hydrogen and the heaviest is Hassium. The unity for atomic mass is gram per mol.
Which is the heaviest gas?
radon
Which gas is heavier than air?
The ratio of the gases molecular weight compared to air is called its vapor density. With air being equal to 1, gases with vapor densities below 1 are then lighter than air and gases with vapor densities greater than 1 are heavier than air….GasMethanesAmmonia0.8Benzene1.9Butane1.7Carbon Monoxide1.117
Which period can you find helium?
Find Helium on the Periodic Table. Helium is the second element on the periodic table. It is located in period 1 and group 18 or 8A on the righthand side of the table. This group contains the noble gases, which are the most chemically inert elements on the periodic table.
Which gas is lighter than air?
How many times Hydrogen is lighter than air?
At standard temperature and pressure, hydro- gen exists as a gas. Hydrogen is the lightest of all gases and is 14 times lighter than air.
What is lighter than air but can never be lifted?
I’m lighter than air but a million men can’t lift me. What am I? A bubble.
Is ammonia is lighter than air?
Anhydrous ammonia gas is considerably lighter than air and will rise in dry air.
What absorbs ammonia?
Vinegar will neutralize ammonia while getting rid of the smell. Since vinegar is inexpensive, many people use the versatile liquid to clean their homes from top to bottom. To remove the ammonia odor, blot or spray the area with pure, undiluted white vinegar. Let the vinegar dry on the surface.
Is ammonia bad to breathe in?
Ammonia is corrosive. The severity of health effects depends on the route of exposure, the dose and the duration of exposure. Exposure to high concentrations of ammonia in air causes immediate burning of the eyes, nose, throat and respiratory tract and can result in blindness, lung damage or death.