Question

name:
elements, compounds, and mixtures (worksheet)
q.1. write t or true if the statement is true; write f or false if the statement is false.

1. all pure substances are elements.
2. atom is the smallest unit of an element.
3. homogeneous mixtures are also called solutions.
4. mixtures cannot be broken down into anything simpler by physical methods.

q.2. fill in the blanks with suitable words.
a) _____ is a pure substance containing only one kind of atom.
b) _____ is a pure substance containing two or more kinds of atoms.
c) _____ is a substance made up two or more different substances physically combined.
d) a _____ mixture is a mixture in which the composition is not uniform throughout the mixture.
e) a _____ mixture is a mixture in which the composition is uniform throughout the mixture.
q.3 fill in the blanks using the following word bank.
heterogeneous

Explanation:

Q.1: Answer-Explanation Format

1. Pure substances include both elements and compounds, not just elements.
2. The atom is the smallest unit of an element that retains its properties.
3. Homogeneous mixtures have uniform composition, which are defined as solutions.
4. Mixtures can be separated into simpler substances using physical methods like filtration or distillation.

a) An element is a pure substance made of only one type of atom.
b) A compound is a pure substance where two or more different atoms are chemically bonded.
c) A mixture consists of two or more substances combined physically, not chemically.
d) A heterogeneous mixture has non-uniform composition throughout.
e) A homogeneous mixture has uniform composition throughout.

Note: The word bank only provides "heterogeneous", but based on the context of the worksheet, the complementary term for homogeneous mixtures is typically included. Assuming the full intended word bank is heterogeneous, homogeneous, element, compound, mixture (to match Q2/Q1 context), the blank would be filled with the missing key term.

Answer:

1. F
2. T
3. T
4. F

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Q.2: Answer-Explanation Format