Chemistry Ch 1 Matter and Energy : 1.5 Elements, Compounds, and Mixtures (Knewton)
Elements are made of atoms that all have the same properties. How many individual atoms (all with the same properties) can a pure substance contain and still be considered an element? A. 1 B. 2 C. 4 D. There is no limit as to how many atoms an element can consist of.
D. There is no limit as to how many atoms an element can consist of.
A compound is a chemical substance composed of two or more kinds of elements in a fixed ratio. By what means can the components of a compound be separated? A. Chemical means B. Physical means C. Both Chemical or physical means
A. Chemical means
A homogeneous mixture like salt and water can be separated by: A. distillation B. electrolysis C. shaking vigorously D. filtration
A. distillation
A homogenous mixture varies from a heterogenous mixture in that a homogenous mixture has properties that: A. do not vary in the mixture B. vary in the mixture C. suspend in a liqui D. dissolve a solute
A. do not vary in the mixture
If something is a compound, it is also A. an element B. a pure substance C. a mixture
B. a pure substance
A homogeneous mixture is also known as a: A. compound B. solution C. solid D. all of the above
B. solution
Chicken noodle soup is an example of A. a homogenous mixture. B. a pure substances. C. a heterogenous mixture. D. a compound.
C. a heterogenous mixture.
The nucleus of an atom can be split into smaller components by what kind of process? A. a physical process B. a chemical process C. melting D. none of the above
D. none of the above
