A) element to element. B) group to group. C) row to row. D) column to column.
A) burning wood into charcoal B) dissolving salt in water C) rusting iron D) cooking an egg
A) bonds. B) nuclei of the atoms. C) movement of the electrons. D) bonds.
A) two atoms of oxygen B) two atoms of chlorine C) one atom of chlorine D) one atom of oxygen
A) usually reacts with a metal B) tastes sour C) feels slipperychanges the color of an indicator D) changes the color of an indicator
A) the use of knowledge to solve problems. B) science that uses computers. C) new inventions. D) the use of lenses and microscopes.
A) protons and neutrons B) neutrons C) valence electrons D) protons
A) touching hot objects with your bare hands. B) eating or drinking from laboratory glassware. C) testing on odor by directly inhaling the vapor. D) tying back long hair and loose clothing.
A) condensation B) freezing C) evaporation
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) formation of a precipitate C) change in color D) change in shape
A) planets orbiting the sun. B) light energy in a vacuum. 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) beta decay C) alpha decay
A) the number of neutrons in the nucleus B) the number of protons in the nucleus C) the number of electrons in outermost energy level
A) physical change. B) chemical change
A) 12.3 m. B) 0.123 m. C) 1.23 m.
A) increases B) decreases C) does not change
A) They are extremely nonreactive. B) The are located in the left-most column of the periodic table in group I. C) They are usually gases.
A) sublimation B) melting C) condensation
A) water. B) hydrogen. C) gold. D) table salt.
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) gas B) liquid C) solid
A) not uniform throughout.(this means it IS NOT the same) B) uniform throughout. ( this means it IS the same)
A) physical bonds B) chemical bonds C) electric currents
A) boiling B) melting C) freezing
A) ice being carved B) water breaking down into hydrogen and oxygen 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) protons plus the number of neutrons. B) protons. C) electrons plus the number of neutrons
A) conclusion B) hypothesis C) scientific method.
A) Kelvin. B) ampere. C) mole.
A) helium (He) and copper (Cu) B) iron (Fe) and potassium (K) C) oxygen (O) and calcium (Ca)
A) warm water B) cold water C) hot 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) pressure. B) viscosity. C) energy.
A) is destroyed B) is released C) is created D) is absorbed
A) carbon dioxide B) water C) oxygen D) milk
A) very small amounts of mass. B) tremendous amounts of mass.
A) drawing conclusions. B) doing experiments. C) formulating questions.
A) must still be tested by experiments. B) has been tested by many observations. C) that can never be changed.
A) transfer of neutrons between two metals. B) transfer of electrons between metals and nonmetals. C) sharing of electrons between two nonmetals.
A) doing experiments. B) designing models. C) drawing conclusions.
A) eight protons in its nucleus B) a total of eight neutrons and electrons. C) eight neutrons in its nucleus. |