60 Questions
What is a compound?
A substance made up of two or more different kinds of atoms
What do water and hydrogen peroxide have in common?
They contain hydrogen and oxygen
What is a molecule?
A cluster of atoms that are bonded together in a specific manner
What is the difference between a molecule and a crystal lattice?
A molecule is a cluster of atoms, while a crystal lattice is a regular pattern of atoms
What is the purpose of a chemical formula?
To represent the composition of a compound
What is the formula unit of sodium chloride?
NaCl
What is the result of a chemical reaction?
The formation of new molecules
What do the subscripts in a chemical formula indicate?
The number of each type of atom in a molecule
What is an element?
A substance made up of only one kind of atom
What is a diatomic molecule?
A molecule made up of two atoms of the same element
What is unique about each compound?
Its chemical formula
What is the role of chemical bonds in a compound?
They attract the atoms in a molecule
What is the fixed ratio of atoms in a compound?
Fixed, giving the compound its unique properties
What is the difference between water and hydrogen peroxide?
Water has a fixed ratio of 2 hydrogen atoms to 1 oxygen atom, while hydrogen peroxide has a fixed ratio of 2 hydrogen atoms to 2 oxygen atoms
What is the difference between water and hydrogen peroxide?
Their chemical formulas
What is a characteristic of a compound?
It is made up of two or more different kinds of atoms
What happens to the atoms in a chemical reaction?
They rearrange themselves to form new molecules
What is the significance of the fixed ratio of atoms in a compound?
It gives the compound its unique properties
What is the purpose of a chemical name?
To uniquely identify a compound
What is the result of the reaction between hydrogen and oxygen?
The formation of water
What is the primary reason for the formation of compounds?
Atoms desire to achieve more stable configurations.
What is represented by the chemical formula of a compound?
The types and numbers of atoms in a molecule.
During a chemical reaction, what happens to the bonds between atoms?
New bonds form and old bonds break.
What is the significance of the subscript in a chemical formula?
It indicates the number of each type of atom.
What determines the distinct properties of water and hydrogen peroxide?
The ratio of hydrogen to oxygen atoms.
What is the result of the reaction between hydrogen and oxygen?
Formation of water.
What type of forces hold atoms together in a compound?
Chemical bonds.
What is true about the atoms in a compound?
They are mixed together in a fixed ratio.
What is the purpose of a chemical formula?
To represent the composition of a compound.
What happens when atoms rearrange themselves during a chemical reaction?
They become more stable.
What is the main characteristic of the atoms in a compound?
They are combined in a fixed ratio.
What is the term for the smallest repeating unit of a compound that represents its composition?
Formula unit
What is the difference between water and hydrogen peroxide?
The ratio of hydrogen to oxygen atoms.
What is the term for a group of atoms bonded together in a specific manner?
Molecule
What is the arrangement of atoms in a crystal lattice?
Regular and repeating
What is the characteristic of elements that naturally exist as diatomic molecules?
They consist of two atoms of the same element.
What is the result of combining atoms in a fixed ratio?
A compound with unique properties
What is the difference between a molecule and a compound?
A molecule is a group of atoms, while a compound is a substance made up of molecules.
What is the characteristic of the atoms in a water molecule?
They are a combination of hydrogen and oxygen atoms.
What is the purpose of the fixed ratio of atoms in a compound?
To give the compound its unique properties
Which of the following is an example of a diatomic molecule?
Oxygen (O₂)
What is the smallest repeating unit that represents the composition of a compound in a crystal lattice?
Formula unit
Which of the following compounds has a fixed ratio of 2 hydrogen atoms to 2 oxygen atoms?
Hydrogen peroxide (H₂O₂)
What is the primary reason for the unique properties of a compound?
The fixed ratio of atoms in the compound
Which of the following is NOT an example of a compound?
Oxygen (O₂)
What is the term for the arrangement of atoms in a repeating pattern in a compound?
Crystal lattice
Which of the following elements naturally exists as a diatomic molecule?
Oxygen (O₂)
What is the result of combining atoms in a fixed ratio?
Formation of a compound
Which of the following statements is true about the atoms in a compound?
Atoms in a compound are always of different elements
What is the characteristic of molecules that are composed of two or more different kinds of atoms?
They are molecules
Which of the following statements is true regarding the atoms in a compound?
The atoms in a compound are held together by chemical bonds.
What is the significance of subscripts in a chemical formula?
They indicate the number of each type of atom in a molecule.
What is the primary reason for the formation of a compound during a chemical reaction?
Atoms rearrange themselves to achieve a more stable configuration.
What is the characteristic of a compound that distinguishes it from other compounds?
Its unique name and chemical formula.
What happens to the atoms in a chemical reaction that forms a compound?
Atoms combine in a fixed ratio to form a compound.
What is the significance of the chemical formula of a compound?
It indicates the types and numbers of atoms in a molecule of the compound.
What is true about the chemical bonds in a compound?
They are attractive forces that bind atoms together.
What is the result of the reaction between hydrogen and oxygen?
Water is formed.
What is the characteristic of the chemical formula of hydrogen peroxide?
It has a subscript of 2 for oxygen.
What is the significance of the ratio of atoms in a compound?
It determines the distinct properties of the compound.
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