What is the Z number of an atom with 9 protons, 8 neutrons, and 7 electrons?

7
8
9
16
17

9

Explanation:

The Z number is the atomic number. The atomic number is number of protons in the atom that defines what element it is. In this case there are 9 protons, making that the atomic number/Z number.

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gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.