A) element to element. B) column to column. C) group to group. D) row to row.
A) cooking an egg B) rusting iron C) burning wood into charcoal D) dissolving salt in water
A) bonds. B) movement of the electrons. C) nuclei of the atoms. D) bonds.
A) two atoms of chlorine B) one atom of oxygen C) two atoms of oxygen D) one atom of chlorine
A) changes the color of an indicator B) usually reacts with a metal C) tastes sour D) feels slipperychanges the color of an indicator
A) science that uses computers. B) the use of lenses and microscopes. C) new inventions. D) the use of knowledge to solve problems.
A) valence electrons B) protons C) neutrons D) protons and neutrons
A) touching hot objects with your bare hands. B) testing on odor by directly inhaling the vapor. C) eating or drinking from laboratory glassware. D) tying back long hair and loose clothing.
A) evaporation B) condensation C) freezing
A) one atom’s nucleus and another atom’s electrons B) atoms with neutral charges C) ions with opposite charges
A) formation of a precipitate B) change in shape C) production of a gas D) change in color
A) light energy in a vacuum. B) planets orbiting the sun. C) was a vibrating string.
A) a suspension. B) a colloid. C) a solution.
A) particles that make up a substance move. B) bonds between atoms break down.
A) alpha decay B) beta decay C) gamma decay
A) the number of electrons in outermost energy level B) the number of protons in the nucleus C) the number of neutrons in the nucleus
A) chemical change B) physical change.
A) 0.123 m. B) 1.23 m. C) 12.3 m.
A) increases B) decreases C) does not change
A) They are extremely nonreactive. B) They are usually gases. C) The are located in the left-most column of the periodic table in group I.
A) condensation B) sublimation C) melting
A) hydrogen. B) water. C) table salt. D) gold.
A) iron ions with a + 2 charge B) iron ions with a + 11 charge
A) on the right side B) in the bottom rows C) on the left-most side
A) liquid B) solid C) gas
A) uniform throughout. ( this means it IS the same) B) not uniform throughout.(this means it IS NOT the same)
A) physical bonds B) chemical bonds C) electric currents
A) freezing B) boiling C) melting
A) water breaking down into hydrogen and oxygen B) ice being carved C) water boiling
A) liquid B) solid C) gas
A) their outermost energy level is full with 4 electrons B) their outermost energy level is full with 8 electrons
A) electrons plus the number of neutrons B) protons plus the number of neutrons. C) protons.
A) conclusion B) hypothesis C) scientific method.
A) Kelvin. B) mole. C) ampere.
A) iron (Fe) and potassium (K) B) oxygen (O) and calcium (Ca) C) helium (He) and copper (Cu)
A) warm water B) cold water C) hot water
A) can be seen and touched. B) can be weighted. C) has mass and takes up space.
A) Never do experiments that involve flames or hot objects. B) Never work with chemicals. C) Always follow your teacher’s instructions and textbook directions exactly.
A) two carbon atoms. B) two oxygen atoms.
A) 0 B) +1 C) -1
A) energy. B) pressure. C) viscosity.
A) is released B) is destroyed C) is created D) is absorbed
A) water B) oxygen C) carbon dioxide D) milk
A) very small amounts of mass. B) tremendous amounts of mass.
A) drawing conclusions. B) formulating questions. C) doing experiments.
A) that can never be changed. B) has been tested by many observations. C) must still be tested by experiments.
A) sharing of electrons between two nonmetals. B) transfer of neutrons between two metals. C) transfer of electrons between metals and nonmetals.
A) designing models. B) drawing conclusions. C) doing experiments.
A) a total of eight neutrons and electrons. B) eight neutrons in its nucleus. C) eight protons in its nucleus |