Ques:Answer the following question given this paragraph: Ionic bonding typically occurs when it is easy for one atom to lose one or more electrons and another atom to gain one or more electrons. However, some atoms won't give up or gain electrons easily. Yet they still participate in compound formation. How? There is another mechanism for obtaining a complete valence shell: sharing electrons. When electrons are shared between two atoms, they make a bond called a covalent bond. Let us illustrate a covalent bond by using H atoms, with the understanding that H atoms need only two electrons to fill the 1s subshell. Each H atom starts with a single electron in its valence shell:. Q: When electrons are shared between two atoms, they make a bond called a what? Choices: - metallic bond - ionic bond - hydrogen bond - covalent bond A:

Ans:covalent bond
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Ques:Answer the following question given this paragraph: You consist of a great many cells, but like all other organisms, you started life as a single cell. How did you develop from a single cell into an organism with trillions of cells? The answer is cell division. After cells grow to their maximum size, they divide into two new cells. These new cells are small at first, but they grow quickly and eventually divide and produce more new cells. This process keeps repeating in a continuous cycle. Q: What process allows an individual to develop from a single cell into an organism with trillions of cells? Choices: - cell transition - Cell multiplication - cell function - cell division A:

Ans:cell division
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Ques:Answer the following question given this paragraph: Radioactive strontium is dangerous because it can chemically replace calcium in the human body. The bones are particularly susceptible to radiation damage. Write the nuclear equation for the beta emission of strontium-90. Q: What can radioactive strontium replace in the human body making it dangerous? Choices: - potassium - oxygen - magnesium - calcium A:

Ans:calcium
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Ques:Answer the following question given this paragraph: Scientists are searching for ways to create controlled nuclear fusion reactions on Earth. Their goal is develop nuclear fusion power plants, where the energy from fusion of hydrogen nuclei can be converted to electricity. How this might work is shown in Figure below . Q: Scientists goal is develop nuclear fusion power plants, where the energy from fusion of hydrogen nuclei can be converted to what? Choices: - oil - gasoline - wind - electricity A:

Ans:
electricity
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