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What evidence convinced John Dalton that elements must be made of individual particles called atoms?
John Dalton was convinced that elements must be made of individual particles called atoms due to his observations of ratios in chemical reactions. He analyzed the ratios at which elements combine with each other to form compounds, and proposed that atoms combine in simple whole number ratios, leading to the development of his atomic theory.
What elements are combined to make sugar?
Sugar is composed of the elements carbon, hydrogen, and oxygen. These elements combine in various ratios to form different types of sugars, such as sucrose, glucose, and fructose.
Did Dalton's atomic theory state that atoms of different elements combine in simple whole-number ratios can form compounds?
Yes, Dalton's atomic theory included the idea that atoms of different elements can combine in simple whole-number ratios to form compounds. This concept helped explain the law of definite proportions.
Do elements always combine in specific ratios?
The Law of Definite Proportions says that a given chemical compound always contains the same proportion by mass of its constituent elements. This is NOT the same as saying that elements always combine in a specific ratio, because they can combine in different ratios in different compounds. An example of this might be copper oxide which can be CuO or Cu2O, showing a different ratio of copper to oxygen. So, the answer to the question, as asked, is no, elements do not always combine in specific ratios.
What Elements combine in fixed mass ratios to form compounds This must mean that elements?
In chemical compounds, elements combine in fixed ratios by mass to form stable, distinct substances. This observation is summarized in the law of definite proportions, which states that a compound is always composed of the same elements in the same proportions by mass. This principle demonstrates the predictable and reproducible nature of chemical reactions.
What do you get with changing ratios that combine in elements?
In this mode different compounds are obtained.
Do mixtures contain exact ratios of elements?
No, they do not.
Do compounds usually have variable ratios where as mixtures usually have fixed ratios?
No, its the opposite. Compounds have fixed ratios, think of H20, while mixtures can vary. You can make many types of mixtures out of the same things. Because of bonding compounds have fixed ratios.
What is matter made of elements combined in changing ratios?
You think probable compounds.
What is formed when two or more elements combine?
When two or more elements combine, they form a compound. Compounds are composed of atoms of different elements bonded together in specific ratios.
Is sawdust an element compound or a mixture and how do you know which it is?
Sawdust is a mixture because it is composed of different elements and compounds, such as cellulose, lignin, and hemicellulose. Mixtures can be separated into their individual components through physical means, such as filtering or distillation, without changing the properties of the substances. Elements and compounds, on the other hand, combine in fixed ratios and cannot be separated into simpler substances by physical means.
Which elements proved difficult for mendeleev to add to his table because they were found to combine in various ratios with other elements?
The noble gases, such as helium, neon, and argon, were difficult for Mendeleev to add to his table as they were found to be chemically inert and did not easily combine with other elements in fixed ratios. This challenged the periodicity of his table, which was based on the repeating patterns of chemical properties.
What evidence convinced John Dalton that elements must be made of individual particles called atoms?
John Dalton was convinced that elements must be made of individual particles called atoms due to his observations of ratios in chemical reactions. He analyzed the ratios at which elements combine with each other to form compounds, and proposed that atoms combine in simple whole number ratios, leading to the development of his atomic theory.
How did dalton explain the formation of compounds?
Dalton proposed that elements combine in simple whole number ratios to form compounds, based on his atomic theory. He suggested that atoms of different elements combine in specific ratios to form compounds, where each compound has a unique composition. This explanation laid the foundation for understanding chemical reactions and the formation of compounds.
Are sugar crystal compounds mixtures or elements?
Sugar crystal compounds are mixtures, as they are made up of multiple elements bonded together in specific ratios. The sugar crystals are composed of carbon, hydrogen, and oxygen atoms arranged in a specific molecular structure.
What elements are combined to make sugar?
Sugar is composed of the elements carbon, hydrogen, and oxygen. These elements combine in various ratios to form different types of sugars, such as sucrose, glucose, and fructose.
What are compounds composed of?
Compounds are composed of two or more different elements that are chemically bonded together. These elements combine in fixed ratios to form specific compounds with unique chemical and physical properties.
