PhySci 101

Which process involves the formation of light elements?

• nucleosynthesis

• stellar nucleosynthesis

• big bang nucleosynthesis

• both A&B

Which element is first synthesized in the universe seconds after big bang?

• Be

• H

• He

• Li

Which of the following is the most accepted theory about the formation of the universe that explains why it continues to expand?

• Steady State Theory

• Big Bang Theory

• Divine Creation Theory

• Oscillating Theory

Which particles are involved in the formation of a chemical bond?

• protons in the nucleus

• neutrons in the nucleus

• electrons in the innermost shell

• electrons in the outermost shell

Which element is the lightest and at the same time the most abundant in outer space?

• Iron

• Helium

• Lithium

• Hydrogen

How does a chlorine ion differ from a chlorine atom? Chlorine ion ________ than the chlorine atom.

• is more stable

• has more electrons

• has more protons

• all of the above

Which of the following are light elements formed in the Big Bang Nucleosynthesis?

• Hydrogen, helium, lithium, and beryllium

• Carbon, oxygen, nitrogen, and iron

• Gold, silver, uranium, and platinum

• Neon, argon, krypton, and xenon

Which of the following describes an isotope? Atoms with ___________________

• the same atomic mass but different numbers of electrons.

• the same number of protons but different numbers of neutrons.

• different atomic numbers but the same atomic mass.

• no neutrons in the nucleus.

Sophia is explaining to her classmates that an atom's identity can change if its neutron counts changes. Is her explanation correct? Why or why not?

• Yes, because changing the neutron count alters the atomic mass, which determines the atom's identity.

• No, because only the proton count determines an atom's identity, not the neutrons.

• Yes, because isotopes have different identities when their neutron count changes.

• No, because atoms are identified by their number of electrons, not neutrons.

What is the primary element that fuses to form helium in the proton-proton chain process?

• Carbon

• Nitrogen

• Oxygen

• Hydrogen