Unit 1-6 Review
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•
Chemistry
•
10th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Can a mixture be separated?
Back
Yes, mixtures can be separated by physical means such as filtration, distillation, or chromatography.
2.
FLASHCARD QUESTION
Front
This diagram represents a _____ (pure substance that is a compound, mixture of elements, pure substance that is an element, mixture of compounds).
Back
pure substance that is a compound.
3.
FLASHCARD QUESTION
Front
Oxygen has six valence electrons. When forming an ion, oxygen will: (lose six electrons and have a charge of +6, lose six electrons and have a charge of -6, gain two electrons and have a charge of +2, gain two electrons and have a charge of -2).
Back
gain two electrons and have a charge of -2.
4.
FLASHCARD QUESTION
Front
As you move across the periodic table from left to right, the atomic radius decreases. This is because: (the number of protons increases, so attraction to electrons increases, the number of energy levels increases, the number of electrons increases, the atomic mass increases).
Back
the number of protons increases, so attraction to electrons increases.
5.
FLASHCARD QUESTION
Front
What type of bonds are shown in the image? (single, double, triple, ionic).
Back
single.
6.
FLASHCARD QUESTION
Front
What is a pure substance?
Back
A pure substance is a material that has a constant composition and consistent properties throughout.
7.
FLASHCARD QUESTION
Front
Define a mixture.
Back
A mixture is a combination of two or more substances where each substance retains its own properties.
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