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