HELPP ANSWERSSS A student designs an investigation to test the reactivity of two elements with HCl to produce hydrogen gas. Using the periodic table as a model which of the following would you expect to produce the most hydrogen gas within the first minute of the reaction?

A.
Al, because it has the higher ionization energy and more readily accepts electrons to participate in a reaction.

B.
Al, because it has the lower ionization energy and more readily gives up valence electrons to participate in a reaction.

C.
Cs, because it has the lower ionization energy and more easily gives up its valence electrons to participate in a reaction.

D.
Cs, because it has the higher ionization energy and more easily gives up its valence electrons to participate in a reaction.

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.