Elements and compounds Flashcards
What is an Element?
An Element is a substance that can’t be separated, into simpler substances by chemical means.
What are some examples of Elements?
Fe-Iron. O-Oxygen
What is a Compound?
A compound is two or more different elements that have chemically united in fixed proportions.
What are some examples of Compounds?
NaCl-Sodium Chloride. CO2- Carbon Dioxide
What is a substance?
A Substance can either be an element or a compound, which has definite composition, and distinct properties.
What is a mixture?
A mixture is a combination of two or more substances, in which the substances retain their distinct identities.
What is an example of a mixture?
Examples of a mixture are, air, soft drinks, milk and cement.
What are the two different types of mixtures?
The two different types of mixtures are, Heterogeneous, and Homogeneous
What is the definition of a Homogeneous Mixture?
A Homogeneous Mixture is a mixture in which, the appearance of the substance is consistent throughout the whole substance.
What is an example of a Homogeneous Mixture?
Air and Tea
What is the definition of a Heterogeneous Mixture?
A Heterogeneous Mixture is a mixture in which the composition is not uniform.
What are some examples of a Heterogeneous Mixture?
Chicken Noodle Soup, wood, and blood.
What is a Physical Property?
A Physical Property can be measured and observed without changing the composition or identity of a substance.
What are some examples of Physical Properties?
Color, Melting Point, boiling point, and density, are examples of physical Properties.
What is a Chemical Property?
A Chemical property is an observation of how one substance behaves in the presence of another substance.
What is an example of a Chemical property?
Hydrogen gas burns in oxygen gas to form water, or Corrosion, are examples of chemical properties.
What are the two measurable properties of matter?
The Extensive Property, and the Intensive Property.
What is Extensive Property?
The measured value of an extensive property depends on how much is being considered
What are some examples of Extensive Property?
Mass, Length, and Volume, are extensive properties. More matter means more mass. As well, values of the same extensive property can be added together.
What is Intensive Property?
The measured value of an intensive property does not depend on the amount of matter being considered
What is an example of an Intensive property?
Temperature, melting point, boiling point, and density are examples of Intensive properties
