A) element to element. B) column to column. C) row to row. D) group to group.
A) dissolving salt in water B) cooking an egg C) rusting iron D) burning wood into charcoal
A) bonds. B) bonds. C) movement of the electrons. D) nuclei of the atoms.
A) two atoms of oxygen B) two atoms of chlorine C) one atom of oxygen D) one atom of chlorine
A) feels slipperychanges the color of an indicator B) changes the color of an indicator C) usually reacts with a metal D) tastes sour
A) the use of lenses and microscopes. B) new inventions. C) science that uses computers. D) the use of knowledge to solve problems.
A) valence electrons B) protons and neutrons C) neutrons D) protons
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) condensation B) evaporation C) freezing
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) production of a gas C) change in color D) change in shape
A) planets orbiting the sun. B) was a vibrating string. C) light energy in a vacuum.
A) a colloid. B) a suspension. C) a solution.
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 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) 12.3 m. B) 1.23 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 usually gases. C) They are extremely nonreactive.
A) melting B) condensation C) sublimation
A) gold. B) water. C) table salt. D) hydrogen.
A) iron ions with a + 2 charge B) iron ions with a + 11 charge
A) on the left-most side B) in the bottom rows C) on the right side
A) liquid B) solid 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) physical bonds C) chemical bonds
A) melting B) freezing C) boiling
A) water boiling B) ice being carved C) water breaking down into hydrogen and oxygen
A) gas B) solid C) liquid
A) their outermost energy level is full with 8 electrons B) their outermost energy level is full with 4 electrons
A) protons. B) protons plus the number of neutrons. C) electrons plus the number of neutrons
A) hypothesis B) conclusion C) scientific method.
A) ampere. B) mole. C) Kelvin.
A) oxygen (O) and calcium (Ca) B) helium (He) and copper (Cu) C) iron (Fe) and potassium (K)
A) hot water B) cold water C) warm water
A) can be weighted. B) has mass and takes up space. C) can be seen and touched.
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) +1 C) 0
A) pressure. B) energy. C) viscosity.
A) is absorbed B) is created C) is released D) is destroyed
A) water B) oxygen C) carbon dioxide D) milk
A) very small amounts of mass. B) tremendous amounts of mass.
A) drawing conclusions. B) formulating questions. C) doing experiments.
A) that can never be changed. B) must still be tested by experiments. C) has been tested by many observations.
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) designing models. C) drawing conclusions.
A) eight neutrons in its nucleus. B) a total of eight neutrons and electrons. C) eight protons in its nucleus |