What correction should be made to Natasha's table?
a
Mixtures contain at least three or more substances.
b
Pure substances can be separated using physical means.
c
Elements and compounds are considered mixtures.
d
Mixtures are substances that are not chemically combined.
d Mixtures are substances that are not chemically combined.
To determine the correction that should be made to Natasha's table, we need to evaluate each statement and identify any inaccuracies or errors. Let's analyze each statement:
a) "Mixtures contain at least three or more substances."
This statement is incorrect. A mixture can contain any number of substances, including two or more. It is not required to have three or more substances. Therefore, the correction should be made to this statement.
b) "Pure substances can be separated using physical means."
This statement is accurate. Pure substances can indeed be separated using physical means such as boiling, filtering, or distillation. No correction is needed for this statement.
c) "Elements and compounds are considered mixtures."
This statement is incorrect. Elements and compounds are not considered mixtures. Elements are pure substances made up of only one type of atom, while compounds are substances made up of two or more different elements chemically combined. A correction is needed for this statement.
d) "Mixtures are substances that are not chemically combined."
This statement is accurate. Mixtures are combinations of substances that are not chemically combined, meaning they can be separated through physical means. No correction is needed for this statement.
Based on the above analysis, the corrections that should be made to Natasha's table are:
a) Change the statement "Mixtures contain at least three or more substances" to "Mixtures can contain two or more substances".
c) Change the statement "Elements and compounds are considered mixtures" to something like "Elements and compounds are not considered mixtures, they are pure substances".
By making these corrections, the table will accurately represent the concepts of mixtures, pure substances, elements, and compounds.