A) element to element. B) column to column. C) group to group. D) row to row.
A) rusting iron B) dissolving salt in water C) cooking an egg D) burning wood into charcoal
A) bonds. B) movement of the electrons. C) nuclei of the atoms. D) bonds.
A) two atoms of chlorine B) two atoms of oxygen C) one atom of oxygen D) one atom of chlorine
A) usually reacts with a metal B) feels slipperychanges the color of an indicator C) tastes sour D) changes the color of an indicator
A) the use of knowledge to solve problems. B) the use of lenses and microscopes. C) new inventions. D) science that uses computers.
A) valence electrons B) protons and neutrons C) neutrons D) protons
A) testing on odor by directly inhaling the vapor. B) touching hot objects with your bare hands. C) tying back long hair and loose clothing. D) eating or drinking from laboratory glassware.
A) evaporation B) freezing C) condensation
A) one atom’s nucleus and another atom’s electrons B) ions with opposite charges C) atoms with neutral charges
A) production of a gas B) change in shape C) formation of a precipitate D) change in color
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) 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) 0.123 m. B) 12.3 m. C) 1.23 m.
A) increases B) decreases C) does not change
A) They are usually gases. B) The are located in the left-most column of the periodic table in group I. C) They are extremely nonreactive.
A) sublimation B) melting C) condensation
A) gold. B) water. C) hydrogen. D) table salt.
A) iron ions with a + 11 charge B) iron ions with a + 2 charge
A) in the bottom rows B) on the right side C) on the left-most 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) physical bonds B) electric currents C) chemical bonds
A) boiling B) melting C) freezing
A) water breaking down into hydrogen and oxygen B) ice being carved C) water boiling
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) electrons plus the number of neutrons B) protons plus the number of neutrons. C) protons.
A) hypothesis B) conclusion C) scientific method.
A) mole. B) ampere. C) Kelvin.
A) helium (He) and copper (Cu) B) iron (Fe) and potassium (K) C) oxygen (O) and calcium (Ca)
A) hot water B) warm water C) cold water
A) can be weighted. B) has mass and takes up space. 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) pressure. B) viscosity. C) energy.
A) is released B) is absorbed C) is destroyed D) is created
A) oxygen B) milk C) water D) carbon dioxide
A) very small amounts of mass. B) tremendous amounts of mass.
A) drawing conclusions. B) doing experiments. C) formulating questions.
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) a total of eight neutrons and electrons. B) eight protons in its nucleus C) eight neutrons in its nucleus. |