NAS 2 Exam 2 Questions with Correct Answers

NAS 2 Exam 2 Questions with Correct Answers Electron - Answer-Has the smallest mass Accurately describes and Electron - Answer-They are in orbitals around the nucleus & have a negative charge Isotopes - Answer-Two atoms that differ only in the number of neutrons Ion - Answer-Atom or group of atoms that have LOST or GAINED ELECTRONS Ionic Bonds - Answer-Forming of ANIONS & CATIONS Molecular Formula - Answer-Water contains two hydrogen atoms bound to one oxygen atom; "H2O" is therefore water's Four most common elements in the body - Answer-Oxygen Nitrogen Hydrogen Carbon Double covalent bond involves: - Answer-Sharing of two pairs of Electrons Fatty Acids consist mainly of - Answer-Carbon and Hydrogen Fatty Acids are - Answer-Nonpolar and do NOT dissolve in water Hydrogen bonds form between molecules containing _________ bonds; the hydrogen bond is between a hydrogen atom of one molecule and a partially _________ charged atom of another - Answer-Polar covalent; Negatively Water has - Answer-High specific heat; keeps body temperature relatively constant When a strong acid is placed in water, it - Answer-Dissolves and Dissociates Solutions with a pH of 4 is - Answer-Acidic Solution with pH of 7 is - Answer-Neutral