Help in the science pls (my gramm3er is dead)

Explanation:

Yes, because the proton and electron numbers are the same. Atoms from the same element with difference neutron numbers is called a isotope.  

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.