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In 1808, scientists thought that substances like oxygen and hydrogen were elements, but they later discovered that these were compounds made up of different elements. One substance that was thought to be an element in 1808, but is actually a compound, is water (H2O).
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Substance in which all atoms are alike?
An element is a substance in which all atoms are alike. Each element is made up of atoms with the same number of protons in their nucleus.
Witch element is likely to be contained in a substance with a yellow color?
Chromium is a likeley element to be contained in a substance with a brilliant yellow color.
What is a one element substance?
A one-element substance is a substance that is composed of only one type of atom. Examples include elemental gases like nitrogen or noble gases like helium.
Would you define a substance as a compound or a mixture or an element?
A substance can be classified as an element, a compound, or a mixture. An element is a pure substance made up of only one type of atom, while a compound consists of two or more elements chemically bonded together. A mixture is a combination of two or more substances that are not chemically bonded.
A pure substance that cannot be broken down into other substances by chemical means?
An element is a pure substance that cannot be broken down into other substances by chemical means. Each element is made up of only one type of atom. Examples of elements include oxygen, carbon, and gold.
Where was barium discovered?
Barium was discovered by Sir Humphry Davy in 1808 in England. Davy isolated barium by electrolyzing molten barium salts.
When was calcium discover?
It was discovered by Sir Humphrey Davy in 1808. Calcium was known and used in various compounds from as early as Roman times, but the element itself was not actually isolated until 1808.
Is iron a substance or a mixture?
An element - substance - NOT a mixture.
What year was the element vanadium discovered?
1808 By del rio
What substance was found not to be an element in 1808?
The secret substance is: Heat energy.
Is an element is a pure substance?
Yes, an element is a pure substance. An element is composed of only one type of atom. There are no other substances in it. So an element is a pure substance.
When all atoms in a substance are alike the substance is a?
When all atoms in a substance are alike, the substance is an element. Each element is composed of atoms that have the same number of protons in their nucleus.
Sodium is a mixture or substance?
a mixture
Is oxygen an element of substance?
its a element
Is gold a pure substance and element?
Yes. Gold is both a pure substance and an element.
Substance in which all atoms are alike?
An element is a substance in which all atoms are alike. Each element is made up of atoms with the same number of protons in their nucleus.
What is a substance that has no other substance mixed with it?
That is an element.
