Q: If two chlorine atoms share their unpaired electrons by making a covalent bond and forming cl2, they can each complete their what? Choices: - hypothesized shell - radiative shell - electron shell - valence shell A:
valence shell

Q: What are the strongest chemical bonds? Choices: - mutual and stock bonds - weak and ionic bonds - curvature and ionic bonds - covalent and ionic bonds A:
covalent and ionic bonds

Q: Q: What is the name of muscular blood vessels that carry blood away from the heart? Choices: - tubes - Veins - Aorta - arteries A:
A: arteries

Question: Q: What system includes the brain and the spinal cord? Choices: - digestive - lymbic - muscular - central nervous A:
Answer: central nervous

*Question*
Q: The electrolysis of what substance produces hydrogen and oxygen gases Choices: - cholesterol - carbon dioxide - hydrocarbon - water A:
**Answer**
water

(Q).
Q: What is a suggested explanation for a phenomenon or a suggested explanation for a relationship between many phenomena called? Choices: - query - system - process - hypothesis A:
(A).
hypothesis