*Question*
Q: In which period of the periodic table is nickel found? Read this paragraph and choose the correct option from the provided answers: The period to which a given element belongs can easily be determined from its electron configuration. For example, consider the element nickel (Ni). Its electron configuration is [Ar]3 d 8 4 s 2 . The highest occupied principal energy level is the fourth, indicated by the 4 in the 4 s 2 portion of the configuration. Therefore, nickel can be found in the fourth period of the periodic table. Choices: - First Period - Second Period - Third Period - fourth period A:
**Answer**
fourth period

*Question*
Q: Scientists think the solar system formed from a big cloud of gas and dust called what? Read this paragraph and choose the correct option from the provided answers: Scientists think the solar system formed from a big cloud of gas and dust, called a nebula . This is the solar nebula hypothesis. The nebula was made mostly of hydrogen and helium. There were heavier elements too. Gravity caused the nebula to contract ( Figure below ). Choices: - comet - supernova - Oort cloud - nebula A:
**Answer**
nebula

*Question*
Q: The type of what dictates how far it can penetrate into matter, such as lead or human flesh? Read this paragraph and choose the correct option from the provided answers: The type of radiation, which dictates how far it can penetrate into matter 2. The energy of the individual particles or photons 3. The number of particles or photons that strike a given area per unit time 4. The chemical nature of the substance exposed to the radiation The relative abilities of the various forms of ionizing radiation to penetrate biological tissues are illustrated inFigure 20.12 "Depth of Penetration of Ionizing Radiation". Because of its high charge and mass, radiation interacts strongly with matter. Consequently, it does not penetrate deeply into an object, and it can be stopped by a piece of paper, clothing, or skin. In contrast, rays, with no charge and essentially no mass, do not interact strongly with matter and penetrate deeply into most objects, including the human body. Several inches of lead or more than 12 inches of special concrete are needed to completely stop rays. Because particles are intermediate in mass and charge between particles and . Choices: - insulation - evaporation - specific gravity - radiation A:
**Answer**
radiation

*Question*
Q: What is the final product of the calvin cycle? Read this paragraph and choose the correct option from the provided answers: The reactions of the Calvin cycle add carbon (from carbon dioxide in the atmosphere) to a simple five-carbon molecule called RuBP. These reactions use chemical energy from NADPH and ATP that were produced in the light reactions. The final product of the Calvin cycle is glucose. Choices: - energy - chloride - insulin - glucose A:
**Answer**
glucose