Intro to Biology Unit 2- WGU (C190) Questions With 100% Correct Answers.

protons - Positively charged particles; located in the nucleus. relative mass of 1.0 Neutrons - the particles of the nucleus that have no charge, located in the nucleus. relative mass of 1.0 Electrons - Negatively charged particles that orbit outside of the nucleus in shells; shells fill following a specific pattern( 2 in the first shell, 8 in the next) relative mass: negligible or 0. Ion - An atom with a positive or a negative charge. Element - is a substance that is composed of a single type of atom. Atomic Mass - the sum of the number of protons and the number of neutrons. Covalent bond - Strong. Occurs between atoms in the same molecule, Electron pairs are shared, creating a strong bond between atoms. Ionic Bond - Moderately strong. Occurs between charged atoms (ions). Electron transfer from one atom to another, resulting in a moderately strong electrostatic attraction between oppositely charged ions. Hydrogen Bond - Weak. Occurs between atoms in different molecules or parts of molecules. Weak electrostatic attraction between areas of molecules with opposite partial charges. 4 properties of water - 1) excellent solvent and can dissolve a wide range of substances. 2) it is cohesive. 3) water's temperature tends to remain stable. 4) solid water (ice) is less dense than liquid nt - the component of the solution in the greatest quantity. Solutes - The components present in lower quantities. Hydrophilic - water loving