30 points 4 correct ! ^u^

this chart lists information from the periodic table about several elements.

which answer correctly fills in the blanks?

a.
lithium has an atomic number of 3; boron has 5 electrons; oxygen has 8 neutrons; neon has an atomic mass of 20.

b.
lithium has an atomic number of 4; boron has 6 electrons; oxygen has 8 neutrons; neon has an atomic mass of 20.

c.
lithium has an atomic number of 7; boron has 11 electrons; oxygen has 16 neutrons; neon has an atomic mass of 10.

d.
lithium has an atomic number of 73; boron has 5 electrons; oxygen has 8 neutrons; neon has an atomic mass of 30.

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)