Answer the following question given this paragraph: Using Lewis Dot Symbols to Describe Covalent Bonding The valence electron configurations of the constituent atoms of a covalent compound are important factors in determining its structure, stoichiometry, and properties. For example, chlorine, with seven valence electrons, is one electron short of an octet. If two chlorine atoms share their unpaired electrons by making a covalent bond and forming Cl2, they can each complete their valence shell:. 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
Answer the following question given this paragraph: 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: Answer the following question given this paragraph: Arteries are muscular blood vessels that carry blood away from the heart. They have thick walls that can withstand the pressure of blood pumped by the heart. Arteries generally carry oxygen-rich blood. The largest artery is the aorta, which receives blood directly from the heart. It branches to form smaller and smaller arteries throughout the body. The smallest arteries are called arterioles. 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: Answer the following question given this paragraph: 31.2 Central nervous system Central nervous system includes the brain and the spinal cord. Brain There are four lobes of the brain. . Q: What system includes the brain and the spinal cord? Choices: - digestive - lymbic - muscular - central nervous A:
Answer: central nervous
*Question*
Answer the following question given this paragraph: The electrolysis of water produces hydrogen and oxygen gases. The electrolytic cell consists of a pair of platinum electrodes immersed in water containing a small amount of an electrolyte, such as H 2 SO 4 . The electrolyte is necessary because pure water does not contain enough ions to effectively conduct a current. At the anode, water is oxidized to oxygen gas and hydrogen ions. At the cathode, water is reduced to hydrogen gas and hydroxide ions. Q: The electrolysis of what substance produces hydrogen and oxygen gases Choices: - cholesterol - carbon dioxide - hydrocarbon - water A:
**Answer**
water
(Q).
Answer the following question given this paragraph: In order to explain the observed phenomenon, scientists develop a number of possible explanations, or hypotheses. A hypothesis is a suggested explanation for a phenomenon or a suggested explanation for a relationship between many phenomena. Hypotheses are always based on evidence that can be tested by observation or experimentation. Scientific investigations are required to test hypotheses. Scientists mostly base hypotheses on prior observations or on extensions of existing scientific explanations. 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