A sample of gaseous neon atoms at atmospheric pressure and 0°C contains 2.69×10^22 atoms per liter. The atomic radius of neon is 69 pm. Required:
a. What fraction of the space is occupied by the atoms themselves?
b. What does this reveal about the separation between atoms in the gaseous phase?

Read the given expression. x = number of protons − number of core electrons which of the following explains the identity of x and its trends across a period? x is the effective nuclear charge, and it remains constant across a period. x is the screening constant, and it remains constant across a period. x is the effective nuclear charge, and it increases across a period. x is the screening constant, and it increases across a period.

Using the periodic table, complete the table to describe each atom. type in your answers

Suppose that a certain fortunate person has a net worth of $71.0 billion ($7.10×1010). if her stock has a good year and gains $3.20 billion (3.20×109) in value, what is her new net worth?