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Which is another name for groups of elements? actinides families halogens periods
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Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture
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Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate
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One nanometer is equal to how many meters?
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Which is another name for groups of elements? actinides families halogens periods...
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