A) element to element. B) row to row. C) column to column. D) group to group.
A) cooking an egg B) dissolving salt in water C) burning wood into charcoal D) rusting iron
A) nuclei of the atoms. B) movement of the electrons. C) bonds. D) bonds.
A) two atoms of oxygen B) one atom of chlorine C) one atom of oxygen D) two atoms of chlorine
A) tastes sour B) usually reacts with a metal C) feels slipperychanges the color of an indicator D) changes the color of an indicator
A) science that uses computers. B) the use of knowledge to solve problems. C) the use of lenses and microscopes. D) new inventions.
A) protons B) neutrons C) valence electrons D) protons and neutrons
A) touching hot objects with your bare hands. B) testing on odor by directly inhaling the vapor. C) eating or drinking from laboratory glassware. D) tying back long hair and loose clothing.
A) condensation B) freezing C) evaporation
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) planets orbiting the sun. B) light energy in a vacuum. C) was a vibrating string.
A) a suspension. B) a colloid. C) a solution.
A) particles that make up a substance move. B) bonds between atoms break down.
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) 0.123 m. C) 1.23 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) melting B) condensation C) sublimation
A) table salt. B) hydrogen. C) gold. D) water.
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) solid C) liquid
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) boiling C) freezing
A) water boiling B) ice being carved C) water breaking down into hydrogen and oxygen
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. C) protons plus the number of neutrons.
A) conclusion B) hypothesis C) scientific method.
A) mole. B) Kelvin. C) ampere.
A) helium (He) and copper (Cu) B) iron (Fe) and potassium (K) C) oxygen (O) and calcium (Ca)
A) cold water B) warm water C) hot water
A) can be weighted. B) can be seen and touched. C) has mass and takes up space.
A) Never work with chemicals. B) Always follow your teacher’s instructions and textbook directions exactly. C) Never do experiments that involve flames or hot objects.
A) two oxygen atoms. B) two carbon atoms.
A) +1 B) 0 C) -1
A) energy. B) pressure. C) viscosity.
A) is absorbed B) is created C) is destroyed D) is released
A) milk B) carbon dioxide C) water D) oxygen
A) tremendous amounts of mass. B) very small 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) sharing of electrons between two nonmetals. B) transfer of electrons between metals and nonmetals. C) transfer of neutrons between two metals.
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 |