Hi i have a science exam on tuesday and really need some help to see if what im doing is right.

The question is - How many electrons, protons and neutrons are in the following: a) Br1-
b) Be2+
c) Ne
d) P1-
e) Fe

AND MY ANSWERS ARE:

a)35 electrons
35 protons
45 neutrons

b)4 electrons
4 protons
5 neutrons

c)10 electrons
10 protons
10 neutrons

d)15 electrons
15 protons
16 neutrons
i don't think this ones right ???

e)26 protons
26 electrons
30 neutrons
i don't think this ones right either???

cOULD YOU PLEASE GIVE ME SOME FEEDBACK uRGENTLUY!! plEASE.

hi i do not understand those websites could u explain it for me??

Sure! I can help you check your answers and explain the process to determine the number of electrons, protons, and neutrons in each of the given species.

a) Br1-
To find the number of electrons, protons, and neutrons in Br1-, you need to understand that the "Br" symbol represents the element bromine. The superscript "-1" indicates that the ion has a charge of -1, meaning it has gained one electron.

- The number of electrons in an ion is determined by subtracting the charge from the number of electrons in the neutral atom. Since a neutral bromine atom (Br) has an atomic number of 35, it has 35 electrons. Adding one more electron gives us 36 electrons.
- The number of protons in an atom or ion equals its atomic number. For bromine, the atomic number is 35, so it has 35 protons.
- The number of neutrons can be calculated by subtracting the atomic number (protons) from the mass number. The atomic mass of bromine is 79.904. Rounding it to 80, we subtract 35 protons from 80 to get 45 neutrons.

Therefore, the correct answer is:
a) Br1- has 36 electrons, 35 protons, and 45 neutrons.

b) Be2+
In this case, "Be" represents the element beryllium, and the superscript "+2" indicates that the ion has a charge of +2, meaning it lost two electrons.

- The number of electrons in the ion is obtained by subtracting the charge from the number of electrons in the neutral atom. A neutral beryllium atom (Be) has an atomic number of 4, so it has 4 electrons. Losing two electrons gives us 2 electrons.
- The number of protons in an atom or ion is equal to its atomic number. For beryllium, the atomic number remains 4, so it also has 4 protons.
- The number of neutrons is determined by subtracting the atomic number (protons) from the atomic mass. The atomic mass of beryllium is 9.0122, rounded to 9. Subtracting 4 protons from 9 gives us 5 neutrons.

So, the correct answer is:
b) Be2+ has 2 electrons, 4 protons, and 5 neutrons.

c) Ne
The symbol "Ne" represents the element neon.

- Neon is a noble gas in Group 18 of the periodic table, and it already has a complete octet (eight valence electrons). Therefore, it is a stable element and does not form ions.
- Neon has an atomic number of 10, so it has 10 electrons and 10 protons.
- The atomic mass of neon is 20.180, rounded to 20. Subtracting 10 protons from 20 gives us 10 neutrons.

Hence, the correct answer is:
c) Ne has 10 electrons, 10 protons, and 10 neutrons.

d) P1-
For this question, "P" represents the element phosphorus, and the superscript "-1" indicates that the ion has a charge of -1.

- The number of electrons in the ion can be found by subtracting the charge from the number of electrons in the neutral atom. A neutral phosphorus atom (P) has an atomic number of 15, so it has 15 electrons. Adding the gained electron gives us 16 electrons.
- The number of protons in an atom or ion equals its atomic number. Phosphorus has an atomic number of 15, so it has 15 protons.
- The number of neutrons can be calculated by subtracting the atomic number (protons) from the atomic mass. The atomic mass of phosphorus is 30.974, rounded to 31. Subtracting 15 protons from 31 gives us 16 neutrons.

Therefore, the correct answer is:
d) P1- has 16 electrons, 15 protons, and 16 neutrons.

e) Fe
Finally, "Fe" represents the element iron.

- Iron is an element found in Group 8 of the periodic table and typically forms ions with a positive charge.
- In its most common form, iron has a charge of +2. However, you didn't mention any superscripts or charge indicators in the question for "Fe." If there is no specific charge mentioned, we assume that the element is neutral.
- A neutral iron atom has an atomic number of 26, so it has 26 electrons and 26 protons.
- The atomic mass of iron is 55.845, rounded to 56. Subtracting 26 protons from 56 gives us 30 neutrons.

Thus, the correct answer is:
e) Fe has 26 electrons, 26 protons, and 30 neutrons.

Please note that when dealing with ions, the number of electrons changes to balance out the charge. You can determine the number of protons and neutrons by using the atomic number and atomic mass, respectively. I hope this feedback helps with your exam preparation, and good luck!