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Which best describes john Dalton's observations of elements in any given compound?
Dalton discovered that the atoms that combine to form compounds are distinguished from one another by their atomic weights. He also learned that all atoms of a given element are identical.
What fact about elements would help explain why two elements would bond with the same element in the same proportion?
If two elements have similar electronegativities or valence electron configurations, they are more likely to bond with the same element in the same proportion. This is because they share similar chemical properties, making them compatible in forming compounds with the same ratios of atoms. This principle is exemplified in the Law of Definite Proportions, which states that compounds always contain the same elements in the same proportion by mass.
What Compounds contain carbon element?
Compounds that contain carbon are known as organic compounds. They can include a wide range of substances, such as carbohydrates, proteins, lipids, and nucleic acids. Carbon's unique ability to form strong covalent bonds with other elements allows for the vast structural diversity found in organic compounds.
Can you always determine an element by the number of neutrons?
No, because some elements have Isotopes, with the same Proton number but different Neutron numbers. Sometimes therefore, the neutron number can overlap with that of isotopes of other elements. For example, two of Helium's isotopes share neutron numbers with two of Hydrogen's isotopes. Deuterium has 1 neutron, and so does 3He, Tritium has 2 neutrons, and so does 4He. It is the number of protons which determines which element it is.
Can an atom of two different elements have the same mass number?
Yes. The mass number is basic to the different elements, even more useful than the atomic number. (Unless it is an isotope. Isotopes have a different amount of neutrons than the basic element atom which makes a difference in mass number too. So, a difference in mass numbers doesn't always mean it is a different element.)
Are elements denser than compounds?
Elements are often denser than compounds, but not always. In fact the least dense substance known is hydrogen, which is an element.
Which element is always found in nature combined with with other elements?
magnesium :)
What element do organic compounds always contain?
Organic compounds always contain the element carbon.
What is the answer to oxides are compounds that always have the element in them?
Oxygen.
Do pure substances always contain one element?
No, pure substances can be either elements or compounds. Elements are substances made up of only one type of atom, while compounds are made up of two or more different types of atoms chemically bonded together.
Are compounds always the same as their elements?
Not necessarily
Are Compound and elements always solid?
No, compounds and elements are not always solids. For example, hydrogen is a gas.
What two elements organic compounds always contain?
Organic compounds always contain Carbon and Hydrogen. Most organic compounds contain elements like Oxygen,Nitrogen,Phosphorus and sulphur. Organic compounds are found in living things.
What do compounds always contain exact ratios of?
elements
John Dalton observed that elments always combine in the same ratio to form a particular?
compound. This led to the development of the Law of Multiple Proportions, which states that when elements form different compounds, the ratios of the masses of one element that combine with a fixed mass of the other element can be expressed in simple whole numbers.
Are Organic compounds covalently bonded and they always contain oxygen?
Organic compounds are covalently bonded molecules that contain carbon, hydrogen, and sometimes other elements like oxygen, nitrogen, sulfur, or phosphorus. Oxygen is not always present in organic compounds, but it is a common element found in many organic molecules.
Is a mixture always made up of a combinations of elements?
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