Ques:Q: Elements below the second period, such as silicon, do not form what as readily as second-period elements, and when they do form, they are weaker than those formed by second-period elements? Choices: - covalent bonds - magnetic bonds - k. bonds - n bonds A:

Ans:n bonds
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Ques:Q: What properties describe the existence of matter, as opposed to chemical properties that describe how substances change into other substances? Choices: - gravitational - astronomical - biological - physical A:

Ans:physical
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Ques:Q: What does pushing an object over the surface of a ramp cause? Choices: - Acceleration - vibration - tension - friction A:

Ans:friction
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Ques:Q: What type of bacteria stains red? Choices: - gram - such bacteria - kilogram-negative bacteria - calcium - negative bacteria - gram-negative bacteria A:

Ans:
gram-negative bacteria
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