A) particles of matter are in constant motion B) particles in gases vibrate in place C) particles in solids do not move D) particles in liquids are still
A) evaporation B) condensation C) sublimation D) vaporization
A) Kool-Aid B) sugar C) salt D) sand
A) paper ripping B) aluminum foil folding C) ice melting D) metal rusting
A) solid B) plasma C) gas D) liquid
A) plastic burning B) water evaporating into water vapor C) apple rotting D) reaction between baking soda and vinegar
A) It is possible for carbon atoms to have either 6 or 7 protons in its nucleus B) All helium atoms have 4 protons in its nucleus C) All lithium atoms have 3 neutrons in its nucleus D) All carbon atoms have exactly 6 protons in its nucleus
A) O B) Ne C) S D) F
A) weight B) mass C) density D) bouyancy
A) an acid B) positively charged C) negatively charged D) a base
A) solid B) liquid C) gas D) plasma
A) N3 B) H2 C) NaOH D) O2
A) adding more ice B) stirring the tea C) using powdered sugar instead of sugar cubes D) heating the tea
A) Bohrium B) Rhenium C) Bromine D) Arsenic
A) Bohr, Dalton, Rutherford, Thomson B) Dalton, Thomson, Bohr, Rutherford C) Dalton, Thomson, Rutherford, Bohr D) Dalton, Rutherford, Thomson, Bohr
A) Chlorine is in the same family as sulfur, has 18 neutrons in its nucleus and is a nonmetal gas. B) Chlorine has 7 valence electrons, and has 35 protons in its nucleus, and is in period 3. C) The atomic number is 17, the atomic mass (weight) is 35.453, and it (Chlorine) is in the same family as Fluorine. D) Chlorine is in group 17, and has 2 energy levels, and is in the Halogen family.
A) I & At B) Na & Mg C) Sb & Te D) Tc & Ru
A) Solid particles do not move. B) Particles in solids vibrate in place. C) Particles in liquids flow around each other. D) Particles in gases have lots of energy and move freely.
A) element B) chemical change C) mixture D) compound
A) evaporation B) condensation C) vaporization D) sublimation
A) atomic weight B) atomic mass C) atomic number D) mass number
A) He proposed that an atom is a positively charged sphere with electrons embedded in it. B) He was the first to suggest that different elements have atoms of different masses. C) His model showed electrons moving in specific layers, shells, or orbits. D) He was the first to propose that an atom was mostly empty space.
A) Yes B) No
A) J.J. Thomson B) Ernest Rutherford C) Niels Bohr D) John Dalton
A) electron cloud B) plum pudding model C) molecule D) nucleus
A) dependent variable B) independent variable C) control D) constant |