A) row to row. B) group to group. C) column to column. D) element to element.
A) burning wood into charcoal B) rusting iron C) dissolving salt in water D) cooking an egg
A) movement of the electrons. B) bonds. C) bonds. D) nuclei of the atoms.
A) one atom of chlorine B) one atom of oxygen C) two atoms of chlorine D) two atoms of oxygen
A) usually reacts with a metal B) changes the color of an indicator C) feels slipperychanges the color of an indicator D) tastes sour
A) the use of knowledge to solve problems. B) science that uses computers. C) the use of lenses and microscopes. D) new inventions.
A) valence electrons B) neutrons C) protons and neutrons D) protons
A) tying back long hair and loose clothing. B) testing on odor by directly inhaling the vapor. C) eating or drinking from laboratory glassware. D) touching hot objects with your bare hands.
A) evaporation B) freezing C) condensation
A) one atom’s nucleus and another atom’s electrons B) atoms with neutral charges C) ions with opposite charges
A) change in shape B) change in color C) formation of a precipitate D) production of a gas
A) light energy in a vacuum. B) was a vibrating string. C) planets orbiting the sun.
A) a suspension. B) a colloid. C) a solution.
A) bonds between atoms break down. B) particles that make up a substance move.
A) beta decay B) gamma decay C) alpha 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) physical change. B) chemical change
A) 1.23 m. B) 12.3 m. C) 0.123 m.
A) increases B) does not change C) decreases
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) melting C) sublimation
A) table salt. B) hydrogen. C) water. D) gold.
A) iron ions with a + 11 charge B) iron ions with a + 2 charge
A) on the right side B) on the left-most side C) in the bottom rows
A) liquid B) gas 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) chemical bonds C) physical bonds
A) freezing B) boiling C) melting
A) water breaking down into hydrogen and oxygen B) water boiling C) ice being carved
A) gas B) solid C) liquid
A) their outermost energy level is full with 4 electrons B) their outermost energy level is full with 8 electrons
A) protons plus the number of neutrons. B) protons. C) electrons plus the number of neutrons
A) scientific method. B) conclusion C) hypothesis
A) mole. B) Kelvin. C) ampere.
A) helium (He) and copper (Cu) B) iron (Fe) and potassium (K) C) oxygen (O) and calcium (Ca)
A) hot water B) cold water C) warm water
A) has mass and takes up space. B) can be weighted. 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 carbon atoms. B) two oxygen atoms.
A) +1 B) 0 C) -1
A) pressure. B) viscosity. C) energy.
A) is absorbed B) is released C) is destroyed D) is created
A) carbon dioxide B) oxygen C) milk D) water
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) 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) 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. |