# Exam 1 part 2

 what are the other names for atomic mass atomic weight, # of protons+neutrons.Weight=mass electrons are ____ smaller than protons. 1/1837 of a proton or H. Dalton's model of the atom 1) elements are composed of minute, indivisible particles called atoms.2) atoms of the same element are alike in mass and size.3) atoms of different elements have masses and sizes. What part of Dalton's model had to be modified: the neutron # of an isotope increases mass.  They had to modify the statement:atoms of the same element are alike in mass and size. Who discovered ion Michael Faraday Who discovered the electron and structure of the atom J.J. Thomson discovered the electron is in the sphere with the neutrons and protons packed in the center. Who discovered neutrons chadwick Explain isotopic notation in where these are located: Mass number Atomic number Symbol Atom Charge Mass number (top left)Atomic number (bottom left)Symbol (right)Atom Charge (top right) How to you calculate the mass number? Protons+neutrons= atomic number. how many electrons does an atoms have (Al+3) if it give it's 2 electrons? 10 electrons, because Aluminum has 13 proton=13 electrons. 13-3=10. How many electrons does Cl^-1 have if it has the mass #37? 18 electrons, because Cl has 17 protons, 17 electrons. a -1 charge indicates 1 more electrons. Cl^+2 has ___ electrons 15 electrons, because it has 17 in a neutral atom.  It lost 2 electrons to get a + charge. what is the shape volume and how compact are the particles in a solid shape: definite Volume: definite particles: compact what is the shape volume and how compact are the particles in a liquid shape: indefinite volume: definite particles: slightly compact what is the shape volume and how compact are the particles in a gas shape: indefinitevolume: indefiniteparticles: highly compressible/spaced charge and group A1 Alkali metals +1 group 2: name & charge Alkali earth metals, +2 charge group 3-12: name & charge transition metals & variable charge group 13: name & charge Metalloid (B), and non-metal, +3 charge group 14: name & charge metalloid (Si, Ge), and non-metals variable charge group 15: name & charge non-metal and metalloid (Sb), -3 charge. group 16: name & charge non-metals and metalloid (Te), -2 charge Group 17: name & charge Halogen, -1 charge Group 18: name & charge noble gas, 0 charge. Authorstudysuccess ID214889 Card SetExam 1 part 2 Descriptionexam 1 part 2, chemistry 121, chemeketa Community college Updated2013-04-21T23:30:05Z Show Answers