Answer the following question given this paragraph: An atom is the smallest unit of a chemical element . That is, an atom has all the properties of that element. All atoms of the same element have the same number of protons. Q: What is the smallest unit of a chemical element called? Choices: - cell - droplet - nucleus - atom A:
atom

Answer the following question given this paragraph: PET is used in tires, photographic film, food packaging, and clothing. Polyester fabric is used in permanent-press clothing. Its resistance to wrinkling comes from the cross-linking of the polymer strands. Q: Polyester fabric's resistance to wrinkling comes from the cross-linking of what? Choices: - algae strands - velocity strands - wool strands - polymer strands A:
polymer strands

Answer the following question given this paragraph: As we studied in our chapter on the periodic table, we saw that elements share a number of important properties with other elements found in the same group. The chemical behavior of a given element is largely dictated by the configuration of its valence electrons. Many elements have a tendency to gain or lose electrons in order to achieve a more stable configuration. When a neutral atom gains or loses electrons, it becomes an ion. In this lesson, we will look at ways to predict what type of ion a given element is likely to form. Q: What happens when a neutral atom gains or loses electrons? Choices: - it loses protons - it gains protons - it loses neutrons - it becomes an ion A:
it becomes an ion

Answer the following question given this paragraph: Excretion is the process of removing wastes and excess water from the body. It is one of the major ways the body maintains homeostasis. Organs of excretion make up the excretory system. They include the kidneys, large intestine, liver, skin, and lungs. Q: What is the process of removing wastes and excess water from the body? Choices: - depletion - diffusion - ingestion - excretion A:
excretion