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