A) column to column. B) row to row. C) group to group. D) element to element.
A) burning wood into charcoal B) cooking an egg C) rusting iron D) dissolving salt in water
A) nuclei of the atoms. B) bonds. C) movement of the electrons. D) bonds.
A) two atoms of chlorine B) two atoms of oxygen C) one atom of chlorine D) one atom of oxygen
A) tastes sour B) changes the color of an indicator C) feels slipperychanges the color of an indicator D) usually reacts with a metal
A) new inventions. B) science that uses computers. C) the use of lenses and microscopes. D) the use of knowledge to solve problems.
A) valence electrons B) neutrons C) protons and neutrons D) protons
A) tying back long hair and loose clothing. B) eating or drinking from laboratory glassware. C) testing on odor by directly inhaling the vapor. 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) formation of a precipitate B) change in shape C) production of a gas D) change in color
A) light energy in a vacuum. B) was a vibrating string. C) planets orbiting the sun.
A) a solution. B) a colloid. C) a suspension.
A) bonds between atoms break down. B) particles that make up a substance move.
A) alpha decay B) beta decay C) gamma decay
A) the number of electrons in outermost energy level B) the number of neutrons in the nucleus C) the number of protons in the nucleus
A) physical change. B) chemical change
A) 1.23 m. B) 0.123 m. C) 12.3 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) melting B) sublimation C) condensation
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 left-most side B) on the right side C) in the bottom rows
A) liquid B) gas C) solid
A) not uniform throughout.(this means it IS NOT the same) B) uniform throughout. ( this means it IS the same)
A) chemical bonds B) electric currents C) physical bonds
A) freezing B) melting C) boiling
A) water breaking down into hydrogen and oxygen B) water boiling C) ice being carved
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) protons plus the number of neutrons. B) electrons plus the number of neutrons C) protons.
A) scientific method. B) conclusion C) hypothesis
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) 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) Always follow your teacher’s instructions and textbook directions exactly. B) Never do experiments that involve flames or hot objects. C) Never work with chemicals.
A) two oxygen atoms. B) two carbon atoms.
A) -1 B) 0 C) +1
A) energy. B) pressure. C) viscosity.
A) is created B) is released C) is absorbed D) is destroyed
A) carbon dioxide B) oxygen C) milk 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) designing models. B) drawing conclusions. C) doing experiments.
A) eight protons in its nucleus B) eight neutrons in its nucleus. C) a total of eight neutrons and electrons. |