Question.259 - Question 1 1?/ 1?pts Which answer choice correctly describes the structure of an atom?? ?? An atom is a ball of protons, neutrons, electrons evenly distributed around each other. ? ?? Most of the space of an atom is taken up by the protons. ? ?? Protons and neutrons form the nucleus of an atom; electrons orbit outside of the nucleus ? ?? Protons are in the nucleus; neutrons and electrons orbit around the protons. ? ? PartialQuestion 2 0.5?/ 1?pts Which of the following definitions describes compounds? Click all that apply.? ?? Is considered a pure substance because it can't be physically separated. ? ?? Is a mixture of elements.? ?? Can be separated by chemical reactions. ? ?? Atoms of two or more different elements bonded together. ? ?? Has different characteristics than the elements that make it up. ? ? Question 3 1?/ 1?pts Match the biomolecule to a function.? lipid? ?? ?? ?? ?? ? carbohydrate? ?? ?? ?? ?? ? protein? ?? ?? ?? ?? ? nucleic acid ? ?? ?? ?? ?? ? ? Question 4 1?/ 1?pts ________ is the polysaccharide most commonly found in highly fibrous foods such as celery. ?? Glycogen ? ?? Chitin ? ?? Cellulose ? ?? Starch ? ? Question 5 1?/ 1?pts How can we explain that water is a solvent? ?? Water has a polar nature, and as such its polar molecules will bind to substances that have positive or negative charges. ? ?? Water is a heavy substance, and as such can disrupt pre-existing bonds. ? ?? Water is highly cohesive and adhesive, which allows it to bind to different substances as a solvent. ? ?? Water is very dense in its liquid state, which allows it to bind to different substances as a solvent. ?

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