Stellar nucleosynthesis makes stars shine and heavier elements form

What is the heaviest element directly produced by nuclear fusion in the core of high-mass stars?Group of answer choicesHeliumIronSiliconNickelCarbonGold

Select the statement that is trueGroup of answer choicesAs the star exhausts its hydrogen, it begins lithium burning to fuse heavier nuclei to form increasingly larger atomsA gamma ray has energy, mass and chargeIn star formation, clouds of atomic hydrogen are pulled together by electrostatic attractionsAll atoms are generated from the simplest nuclide, hydrogen, by nuclear reactions

he weight of a star is usually balanced by two forces: the gravitational force, acting inward, and the force created by nuclear reaction, acting outward. Over a long period of time, the force due to nuclear reactions gets weaker, causing the gravitational collapse of the star and crushing atoms out of existence. Under such extreme conditions, protons and electrons are squeezed to form neutrons, giving birth to a neutron star. Neutron stars are massively heavy-a teaspoon of the substance of a neutron star would weigh 100 million metric tons on the Earth.  Consider a neutron star whose mass is twice the mass of the Sun and whose radius is 12.1 km. (The mass of the Sun is 1.99 ⋅ 1030 kg1.99 · 1030 kg ) If it rotates with a period of 1.73 s, what is the speed of a point on the Equator of this star? (You may enter your calculation using scientific notation.) 4.395E4 Numeric ResponseEdit Unavailable. 4.395E4 correct.m/s

What nuclear process involves heavy nuclei splitting into lighter nuclei?

On the main sequence, stars obtain their energyGroup of answer choicesfrom nuclear fissionfrom gravitational contractionfrom chemical reactionsby converting helium to carbon, nitrogen and oxygenby converting hydrogen to helium