Helium.
The Schwarzchild radius of a 2 solar mass black hole would be about 5.9 km.
I suppose that you think to a "solar flare".Coronal mass ejections are bigger than solar flares.
Betelgeuse is a type M Red Supergiant with a probable mass between 10 and 20 solar masses. Because of its mass it will continue to fuse elements until it reaches the iron phase at which time it will explode as a Type II supernova probably leaving behind a Neutron star of about a 20km radius.
The stars solar mass, or relative size to the sun. If its gravity is big enough, when it does condense in on itself, it will create a black hole. If not, it will form a highly dense clump of matter, or a Neutron Star If the stars mass is more than 3 solar masses, it will form a black hole. If it is less, it will form a neutron star
... more massive (it has more mass).... more massive (it has more mass).... more massive (it has more mass).... more massive (it has more mass).
The heaviest term for mass that I've ever came across is a Solar Mass. As in the star Beta Pictorus is said to be 1.5 solar masses.
Jupiter is the biggest and heaviest planet.
Ununseptium and Ununoctium are currently tied.
Jupiter, with a mass 318 times that of the Earth.
If you mean mass, then the answer would be no. Within our solar system, Jupiter has the greatest mass at 1899x1024kg, while Earth is the fourth most massive at 5.97x1024kg.
Uranium has the heaviest atoms out of these three elements. It is a radioactive element with atomic number 92 and a relatively high atomic mass.
The heaviest (hevest?) naturally occurring element is Uranium (238 a.m.u.) but the heaviest known element is atom number 114, 117 or 118, the exact mass being unknown but over 250.
Comparison of the size of Uranus and the Earth. Uranus is 51118 km or about four Earths wide. It is the third widest and fourth heaviest planet in the Solar System
Uranium - atomic weight; 238,02891 But now it is more correct to consider plutonium as the heaviest natural element (mass: 244 for the isotope 244Pu).
Hydrogen is the most abundant element and makes up 99.8% of the Solar System.
In our solar system, the largest planet, Jupiter, is indeed also the heaviest, weighing in at about 317 times the mass of Earth. However, a larger planet isn't necessarily a heavier one - for example, Uranus is larger but less massive than Neptune.
Ganymede, the largest moon of Jupiter with a mass of 1.4819 x 1023kg