Why do sodium and potassium have similar chemical porperties

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Consider the equilibrium system: 2icl(s) ⇄ i2(s) + cl2(g) which of the following changes will increase the total amount of of cl2 that can be produced? all of the listed answers are correct decreasing the volume of the container removing the cl2 as it is formed adding more icl(s) removing some of the i2(s)

Which best explains why an iceberg floats?