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