An alpha particle is composed of

A. nothing
B. two protons and two neutrons
C. one proton and no neutrons
D. one neutron no protons

B. two protons and two neutrons

Explanation: Alpha rays are fast moving streams of positively charged particles which are shown to be helium nuclei represented by 4He2, having a mass number of 4, i.e., having 2 protons and 2 neutrons. Mass number of an element is the sum of the number of protons and neutrons in the nucleus of an atom. A helium atom has 2 protons and 2 neutrons in its atom.

In his poem "For a Lady I Know," Countee Cullen depicts the clash between the upper and lower classes of society. The poem is assumed to be about upper-class white Americans who treat African Americans poorly. He points out the audacity of the upper class to presume that African Americans would continue to wait on them forever, even after death:

She even thinks that up in heaven

Her class lies late and snores

While poor black cherubs rise at seven

To do celestial chores.

This poem suggests that white Americans don’t want to help improve the lifestyle of poor African Americans but are comfortable with the minority races serving them forever.

Explanation:

From Plato :)