2. joaquin was riding his bike for 12 hours. during his 12 hour
ride, he made it 144 kilometers. most of his ride, he was
heading northeast. what was his velocity during his ride?
show work
a. velocity (v) =

the only liquid elements at standard temperature and pressure are bromine (br) and mercury (hg). although, elements caesium (cs), rubidium (rb), francium (fr) and gallium (ga) become liquid at or just above room temperature.

explanation:

a is the answer to this question

explanation:

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.