Ques:Q: How many valence electrons does carbon have? Choices: - one - five - two - four A:

Ans:four
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Ques:Q: Scientists will often observe and then what the reason why a phenomenon occurred? Choices: - realize - normalize - theorize - hypothesize A:

Ans:hypothesize
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Ques:Q: What is the type of cell division where the number of chromosomes is reduced in half? Choices: - cloning - mitosis - interphase - meiosis A:

Ans:meiosis
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Ques:Q: What are the three classifications of elements? Choices: - metals, non-metals and alkaloids - metals, metaloids, and alkaloids - alkaloids, metaloids, and non-metals - metals, non-metals and metaloids A:

Ans:
metals, non-metals and metaloids
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