When two protons and two neutrons fuse into a helium nucleus, energy is emitted and mass remains constant.

What type of microorganism has a peptidoglycan cell wall, has DNA that is not contained in a nucleus, and has flagella?

Indicate whether each statement is true or false. The probability is 100% for finding an electron at the nucleus in a $\pi ^ { * }$ orbital.

Two protons collide, and out come three protons and an antiproton. How is this possible?

Calculate the increase in distance from the nucleus when an electron is excited from the first to the third Bohr orbit.

Which feature is shown in the photo above? A coma B nucleus C impact crater D volcanic crater.

Find the binding energy of a deuteron (a $^ { 2 } \mathrm { H }$ nucleus). The mass of a deutron (not the deuterium atom) is 2.013553 u.

What observation led Rutherford to propose that an atom has a small nucleus containing most of the atom's mass?

Describe the evidence that demonstrates why we know the nucleus of an atom is small, is massive, and contains positive charge.

The organelle labeled $Y$, on which this process occurs, is the (1) nucleus (2) ribosome (3) chloroplast (4) mitochondria

The isotope helium-6 undergoes beta decay. Write the reaction equation and determine the identity of the daughter nucleus.

Which electron is, on average, closer to the nucleus: an electron in a $2 s$ orbital or an electron in a $3 s$ orbital?

Assume nuclei are spherical in shape, show that the radius $(r)$ of a nucleus is proportional to the cube root of mass number $(A)$.

In which organelle does cellular respiration take place? a nucleus, b. chloroplast, c. chlorophyll, d. mitochondrion