Question

what is the smallest unit of an element?
a) atom
b) molecule
c) proton
d) neutron
find the element rb on the periodic table. what family does it belong to?
noble gases
alkali earth metals
halogens
transition metals
lanthanides
metalloids

Explanation:

1. An atom is the smallest unit of an element that retains the chemical properties of that element. Molecules are made of atoms, and protons and neutrons are sub - atomic particles within an atom.
2. Rubidium (Rb) is in Group 1 of the periodic table, and elements in Group 1 are alkali metals.

Answer:

1. A. Atom
2. Alkali Earth Metals (Note: There is a mis - naming in the options, it should be Alkali Metals. But based on the closest option, this is the answer)