Biology Praxis 5235 Study Questions and Answers

Mass Number (atomic mass) is what added together? Protons and Neutrons Atomic number is equal to the number of Protons Do shells closer to the nucleus have more or less energy? Less Energy For an atom to be neutral, it must have the same number of protons and_______________? Electrons A group of atoms joined together by chemical bonds is a ____________________. Molecule A molecule made up of two different atoms or more is called a ____________________. Compound A macromolecule is an organic compound that contains _____________________ and ______________. Hydrogen and Carbon What forms when one atom donates an electron to another atom? Ionic Bond Cation has lost what? An electron An anion has gained what? An electron What's a covalent bond? When two atoms share electrons to have a full valence shell An organic molecule contains ________________ and _______________. Hydrogen and Carbon What are the four main macromolecules? Protein, Lipids, Nucleic Acids, and Carbohydrates Organic Molecule usually have what kind of bond? Covalent Bond, where they share electrons