Question

One o the isotopes of sulfur is represented as sulfur-35 or S-35. What does the number 35 signify?

Answer 1

A) number of protons

B) number of neutrons

C) atomic number

D) mass number

Answer 2

I think it's C I'm I right?

Answer 3

not quite

remember, atomic number is the number of protons, and can be found on the periodic table

a sulfur atom has 16 protons, so its atomic number is 16
sulfur-35 means a sulfur atom with 16 protons and 19 neutrons (35-16 = 19)

35 is the mass number (# of protons + # of neutrons)

Answer 4

So D) mass number

Answer 5

right

Answer 6

Okay thanks