Bromine exists as a mix of bromine 79 and bromine 81 isotopes. an atom of bromine 79 contains:
35 prot.44.neutr.35 electrons
35 prot.and 35 electrons only
44 prot.44 elect and 35 neutr.
35 prot.79 neutr. and 35 electrons
79 protons 79 electrons and 35 neutr.
which is correct please thanks Andy
aha....# of prot and electrons =35 same as atomic number.
#of neutons=mass number - atomic number=44 neutrons...
so 35 protons,44 neutrons and 35 electrons .....hows that???
# protons = atomic number. Look it up on the periodic table.
#protons + #neutrons = mass number (in this case 81 or 79)
does that narrow it down to 35 prot,79 neutrons and 35 electrons?
Soory bit lost on electrons...
Andy
why was there two choices for mass number???
very good. Why are there two mass numbers? Because the problem tells you Br comes in two flavors; i.e., mass number 79 and 81. But they only asked about the 79 isotope.
thanks...... andy
To determine the correct answer, we need to look at the atomic structure of bromine.
Bromine (Br) has an atomic number of 35, which means it has 35 protons. The atomic number also tells us the number of electrons in a neutral atom, so bromine has 35 electrons as well.
Isotopes of an element have the same number of protons but different numbers of neutrons. Bromine has two stable isotopes, bromine-79 and bromine-81.
Now, let's analyze the options provided:
1. 35 protons, 44 neutrons, and 35 electrons: This option does not correspond to the atomic structure of bromine-79 or bromine-81.
2. 35 protons and 35 electrons only: This option correctly represents the atomic structure of bromine, but it does not specify which isotope (bromine-79 or bromine-81) is being referred to.
3. 44 protons, 44 electrons, and 35 neutrons: This option does not match the atomic structure of any known isotope of bromine.
4. 35 protons, 79 neutrons, and 35 electrons: This option correctly represents the atomic structure of bromine-79, one of the isotopes of bromine.
5. 79 protons, 79 electrons, and 35 neutrons: This option does not correspond to the atomic structure of bromine-79 or bromine-81.
Based on the information provided, the correct answer is option 4: 35 protons, 79 neutrons, and 35 electrons.