18 Questions
What type of electrons usually do not participate in chemical reactions?
Core electrons
According to Kekulé and Couper, how many bonds does carbon typically form in stable compounds?
Four bonds
Which scientist proposed the concept of a carbon-carbon triple bond?
Emil Erlenmeyer
In what year did Kekulé propose that carbon chains can form rings of atoms?
1865
According to van’t Hoff, how are the four atoms to which carbon is bonded oriented?
At the corners of a regular tetrahedron
What denotes stability in a stable atomic arrangement?
Bonding
According to Dalton's atomic theory, elements are composed of:
Indivisible particles called atoms
Which of the following statements is consistent with Dalton's atomic theory?
Atoms of the same element are identical in mass and properties
What does Dalton's atomic theory imply about the number of atoms during a chemical reaction?
The total mass of atoms remains constant during a chemical reaction
Which concept is NOT derived from Dalton's atomic theory?
Atomic Structure
What principle related to chemical reactions is consistent with Dalton's atomic theory?
Matter is conserved in chemical reactions
In Dalton's atomic theory, what is the significance of atoms being indivisible?
Atoms have a fixed mass and properties
According to Dalton's atomic theory, which statement is true about atoms of the same element?
They are identical in size, mass, and chemical properties.
In a compound, what is the ratio of the numbers of atoms of any two different elements present?
A simple fraction
Which law states that different samples of the same compound always contain its constituent elements in the same proportion by mass?
Law of definite proportions
What is the composition of an atom according to the experiments conducted by scientists?
Dense, positively charged nucleus surrounded by negatively charged electrons
The Law of conservation of mass states that:
The total mass of substances present at the end of a chemical process remains constant.
What is the charge on neutrons, protons, and electrons respectively?
Neutrons - neutral, Protons - positive, Electrons - negative
Discover the fundamental principles of chemistry with this quiz, covering topics such as identical atoms, compound composition, and chemical reactions. Test your knowledge on the properties and behavior of elements and compounds.
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