A) row to row. B) element to element. C) group to group. D) column to column.
A) rusting iron B) burning wood into charcoal C) cooking an egg D) dissolving salt in water
A) movement of the electrons. B) nuclei of the atoms. C) bonds. D) bonds.
A) two atoms of chlorine B) one atom of chlorine C) one atom of oxygen D) two atoms of oxygen
A) feels slipperychanges the color of an indicator B) usually reacts with a metal C) changes the color of an indicator D) tastes sour
A) science that uses computers. B) new inventions. C) the use of knowledge to solve problems. D) the use of lenses and microscopes.
A) protons B) protons and neutrons C) valence electrons D) neutrons
A) testing on odor by directly inhaling the vapor. B) eating or drinking from laboratory glassware. C) touching hot objects with your bare hands. D) tying back long hair and loose clothing.
A) condensation B) evaporation C) freezing
A) ions with opposite charges B) one atom’s nucleus and another atom’s electrons C) atoms with neutral charges
A) formation of a precipitate B) change in color C) production of a gas D) change in shape
A) light energy in a vacuum. B) was a vibrating string. C) planets orbiting the sun.
A) a solution. B) a colloid. C) a suspension.
A) bonds between atoms break down. B) particles that make up a substance move.
A) alpha decay B) gamma 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) chemical change B) physical change.
A) 1.23 m. B) 0.123 m. C) 12.3 m.
A) increases B) decreases C) does not change
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) melting B) sublimation C) condensation
A) hydrogen. B) gold. C) table salt. D) water.
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) liquid B) gas 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) freezing B) boiling C) melting
A) water breaking down into hydrogen and oxygen B) water boiling C) ice being carved
A) gas B) liquid C) solid
A) their outermost energy level is full with 8 electrons B) their outermost energy level is full with 4 electrons
A) protons plus the number of neutrons. B) protons. C) electrons plus the number of neutrons
A) scientific method. B) hypothesis C) conclusion
A) ampere. B) Kelvin. C) mole.
A) helium (He) and copper (Cu) B) oxygen (O) and calcium (Ca) C) iron (Fe) and potassium (K)
A) warm water B) cold water C) hot 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) 0 B) -1 C) +1
A) energy. B) pressure. C) viscosity.
A) is absorbed B) is destroyed C) is created D) is released
A) milk B) oxygen C) water D) carbon dioxide
A) very small amounts of mass. B) tremendous amounts of mass.
A) doing experiments. B) drawing conclusions. C) formulating questions.
A) has been tested by many observations. B) that can never be changed. C) must still be tested by experiments.
A) transfer of neutrons between two metals. B) transfer of electrons between metals and nonmetals. C) sharing of electrons between two nonmetals.
A) designing models. B) doing experiments. C) drawing conclusions.
A) eight neutrons in its nucleus. B) a total of eight neutrons and electrons. C) eight protons in its nucleus |