Uranium-235, uranium-238, and uranium-239 are different of uranium.

Isotopes

Explanation:

Atoms of the same element always have the same number of protons. But, Atoms of the same element can have a different number of neutrons. We call these isotopes. These 3 examples of uranium have the same amount of protons within them but a different number of neutrons, hence the change in atomic mass.

c. 7/3

step-by-step explanation:

a rational number is like pi- it is a repeating decimal.

a. is -1.8

b. 2.236068

c. 2.3333333333333333333

d.   is 3

i hope that ! =)

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force