Answer the following question given this paragraph: Ground tissue makes up most of the interior of a plant. It carries out basic metabolic functions and stores food and water. Q: What makes up most of the interior of a plant? Choices: - conjunction tissue - support tissue - transport tissue - ground tissue A:
ground tissue
Answer the following question given this paragraph: Aqua regia, a mixture of nitric acid and hydrochloric acid, is one of the few materials that will dissolve gold. This material, translated to "royal water" in English, was named so because it could dissolve the royal metal gold. First noted in the fourteenth century, aqua regia could be used to help ascertain whether a particular material was actually gold or was some trickery of the alchemist. Nitric acid by itself will not dissolve gold, but will in combination with hydrochloric acid. The chemistry of the process is rather complex, with both acids reacting with the metal to form soluble gold compounds. The gold can be recovered from the solution, making the process useful for purification purposes. Q: What a mixture of nitric acid and hydrochloric acid? Choices: - crystal regia - acidus regia - sulfate regia - aqua regia A:
aqua regia
Q: Answer the following question given this paragraph: Physical properties describe the existence of matter, and chemical properties describe how substances change into other substances. 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:
A: physical
Question: Answer the following question given this paragraph: Q: What element is essential for amino acid and nucleic acid production? Choices: - oxygen - carbon - hydrogen - nitrogen A:
Answer: nitrogen
*Question*
Answer the following question given this paragraph: The alkaline Earth metals include all the elements in group 2 (see Figure below ). These metals have just two valence electrons, so they are very reactive, although not quite as reactive as the alkali metals. In nature, they are always found combined with other elements. Alkaline Earth metals are silvery grey in color. They are harder and denser than the alkali metals. All are solids at room temperature. Q: Alkaline earth metals are what color? Choices: - white - black - reddish orange - silvery grey A:
**Answer**
silvery grey
*Question*
Answer the following question given this paragraph: Valence electrons of both atoms are always involved when those two atoms come together to form a chemical bond. Chemical bonds are the basis for how elements combine with one another to form compounds. When these chemical bonds form, atoms of some elements have a greater ability to attract the valence electrons involved in the bond than other elements. Electronegativity is a measure of the ability of an atom to attract shared electrons when the atom is part of a compound. Electronegativity differs from electron affinity because electron affinity is a measure of the actual energy released when an atom gains an electron. In contrast, electronegativity is a relative scale, so it is not measured in units of energy. All elements are compared to one another, and the most electronegative element, fluorine, is assigned an electronegativity value of 3.98. Fluorine attracts shared electrons better than any other element. Figure below shows the electronegativity values of most elements. Q: What does fluorine attract better than any other element? Choices: - ionic bonds - electron shells - magnets - shared electrons A:
**Answer**
shared electrons