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