Biology 1406 Exam review Chapter 2 fully solved already passed

Biology 1406 Exam review Chapter 2 fully solved already passedIsotope - correct answer Atoms of the same element that have different numbers of neutrons or different atomic forms of the same element. Molecule - correct answer Two or more atoms held together by covalent bonds. Ion - correct answer An atom or group of atoms that have gained or lost one or more electrons, thus acquiring a charge. Cation - correct answer A positively charged ion. Mass number - correct answer Number of protons + neutrons. Atomic number - correct answer Number of protons. Number of neutrons = - correct answer = Mass number - Atomic number. Describe the basic structure of the atom - correct answer An atom is the smallest unit of matter that defines an element. + This unit consists of a nucleus surrounded by orbiting, negatively charged electrons. The nucleus contains positively charged protons and, most often, neutral neutrons. + The number of protons in the nucleus determines the number of electrons, maintaining electrical neutrality, and the fundamental nature of the atom. + Also, as tiny as atoms are, they still consist mostly of empty space. Ionic bond - correct answer The attractive force between oppositely charged ion, anion, and cation. Ex: NaCl -> Na+ + Cl- Polar bond - correct answer A covalent bond in which electrons are not shared equally.