A) column to column. B) element to element. C) row to row. D) group to group.
A) burning wood into charcoal B) rusting iron C) cooking an egg 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 oxygen D) one atom of chlorine
A) changes the color of an indicator B) usually reacts with a metal C) tastes sour D) feels slipperychanges 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) neutrons B) valence electrons C) protons and neutrons D) protons
A) touching hot objects with your bare hands. B) testing on odor by directly inhaling the vapor. C) tying back long hair and loose clothing. D) eating or drinking from laboratory glassware.
A) freezing B) condensation C) evaporation
A) ions with opposite charges B) atoms with neutral charges C) one atom’s nucleus and another atom’s electrons
A) production of a gas B) change in shape C) formation of a precipitate D) change in color
A) light energy in a vacuum. B) was a vibrating string. C) planets orbiting the sun.
A) a suspension. B) a colloid. C) a solution.
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 electrons in outermost energy level C) the number of protons in the nucleus
A) physical change. B) chemical change
A) 12.3 m. B) 1.23 m. C) 0.123 m.
A) does not change B) decreases C) increases
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) condensation B) melting 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) in the bottom rows B) on the left-most side C) on the right side
A) liquid B) solid C) gas
A) not uniform throughout.(this means it IS NOT the same) B) uniform throughout. ( this means it IS the same)
A) chemical bonds B) physical bonds C) electric currents
A) melting B) freezing C) boiling
A) water boiling B) water breaking down into hydrogen and oxygen C) ice being carved
A) gas B) solid C) liquid
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) hypothesis C) conclusion
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) warm water C) cold water
A) can be seen and touched. B) has mass and takes up space. C) can be weighted.
A) Never work with chemicals. B) Never do experiments that involve flames or hot objects. C) Always follow your teacher’s instructions and textbook directions exactly.
A) two carbon atoms. B) two oxygen atoms.
A) 0 B) +1 C) -1
A) energy. B) pressure. C) viscosity.
A) is destroyed B) is absorbed C) is released D) is created
A) milk B) water C) oxygen D) carbon dioxide
A) very small amounts of mass. B) tremendous amounts of mass.
A) doing experiments. B) formulating questions. C) drawing conclusions.
A) must still be tested by experiments. B) that can never be changed. C) has been tested by many observations.
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) doing experiments. C) drawing conclusions.
A) a total of eight neutrons and electrons. B) eight neutrons in its nucleus. C) eight protons in its nucleus |