The symbol for a radioactive nuclide is 131/56ba which statement is correct?
a) the atomic number of the radioactive nuclide is 75.
b) the mass number of the radioactive nuclide is 131.
c) the number of neutrons that are present in the nucleus of each atom is 56.
d) the number of protons that are present in the nucleus of each atom is 131.

For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.