<div style='margin-bottom: 20px;'> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">How do atoms contribute to the formation of matter?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Atoms are the building blocks of matter.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What defines matter in terms of its physical presence?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Matter is defined as any substance that has mass and occupies space.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">How do isotopes of an element differ from each other?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Isotopes of an element have the same number of protons and electrons but differ in the number of neutrons.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What is the significance of radioisotopes in scientific research and medicine?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Radioisotopes are used in dating fossils, tracing biochemical pathways, genetic research, sugar transport studies, cancer treatment, and medical imaging.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">Why are certain elements crucial for the mass of organisms?</h2> <p style="font-weight: normal; font-size: 1.2rem;">More than 96% of the mass of organisms is made up of the elements oxygen, carbon, hydrogen, and nitrogen.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What role do protons, neutrons, and electrons play in an atom?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Protons, neutrons, and electrons are subatomic particles that make up an atom.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What is the role of ionic bonds in the formation of compounds?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Ionic bonds form when atoms donate or accept electrons to achieve a stable outer energy level, resulting in compounds like sodium chloride.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What distinguishes a molecule from an atom?</h2> <p style="font-weight: normal; font-size: 1.2rem;">A molecule is formed when two or more atoms combine strongly, whereas an atom is the smallest portion of an element with chemical properties.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">How do covalent bonds contribute to the structure of molecules in living organisms?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Covalent bonds, formed when atoms share electrons, are prevalent in most compounds within living organisms.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">Why are hydrogen bonds and Van der Waals interactions important in biological processes?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Although weaker than covalent and ionic bonds, hydrogen bonds and Van der Waals interactions are crucial for the structure and function of biological molecules.</p> </div> </div>