Pretty much all of them. Certainly at least the first 92 (minus, perhaps, technetium), and likely some of the next few as well.
By the time our solar system was forming, all the naturally-occurring elements were present. After all, our Earth formed as part of the solar system, and all the elements we find here have been around for 4.5 billion years.
Our solar system has one star; the Sun.
Our own sun attracted the material that eventually became he solar system. However since the wide range of materials present (all the elements) required the interaction of may suns to form an reform the atoms there are a myriad of unknown older stars represented in the solar system
There is no gravity present in that particular part of the solar system.
The gas substances that compose the majority of the solar system are hydrogen and helium. These elements make up about 98% of the total mass of the solar system, with hydrogen being the most abundant. Other gases like oxygen, carbon, and nitrogen are present in smaller amounts.
The Sun is about 4.57 billion years old, so is the solar system.The age of the Solar System is determined through the radiometric dating of heavy elements such as uranium. Measurement of radioactive decay rates allow us to determine when the elements in the Solar System were formed.The most current data places the age of these elements at 4.567 billion years old. This gives us an upper limit for the age of the Solar System. However, these 4.567 billion-year-old elements were formed by a nearby supernova, and the time it took them to travel from the location of the supernova site to the hydrogen cloud whose gravitational collapse into the Solar System by these elements is at present uncertain. Also uncertain is the precise amount of time it took for the collapse to complete from beginning to end. However, our best estimates place the age of the Solar System at 4.5 to 4.55 billion years.
The two most abundant elements in the solar system are hydrogen and helium.
The three most common substances present in the solar nebula were hydrogen, helium, and small amounts of heavier elements such as carbon, oxygen, and nitrogen. Hydrogen and helium comprised the majority of the nebula's mass, accounting for about 98% of it. These elements formed the primordial gas from which the Sun and the solar system developed. The heavier elements, produced in earlier generations of stars, contributed to the formation of planets and other celestial bodies.
The solar system has existed in its present form for about 4.5 billion years.
When they reach the inner solar system.
The present estimate is about 4.6 billion years.
Hydrogen is the primary element. Most of the mass of our solar system is wrapped up in the sun, which is primarily hydrogen. Our solar system was born in a vast cloud of interstellar hydrogen and other materials spewed out from massive supernova. About 90 of the 92 naturally occurring elements are created in cataclysmic star explosions. So all of these elements would have been present in the debris that collected to form the planets now orbiting our sun. Oxygen, silicon, aluminum, sodium, potassium, calcium, and iron would have been fairly common elements in the inner planets.