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