I have a few questions about chemistry?

Question

You Don't have to answer all of these questions, but please answer in full.

1. I know that if you were to add a (-) to an element it means there is one extra electron
ie: Cl- P+ 17 e- 18 n0 14
(correct me if I'm wrong and say why)

Now what I am confused about is what do you do if it is Cl+? How wuld you determine the number of protons, neutrons, and electons? Why? I need as much information as I can get for this!!!


2. How mant protons and neutrons are in this isotope:

65
30 Zn


Explain please!!

Answer 1

1. Very unlikely to have a Cl+, but anytime you have a + this represents the loss of an electron (or 2 if 2+, etc). Just subtract one electron from the atomic number. Proton number = electron number = atomic number (number usually written above the element symbol on periodic table...will be a whole number). To determine neutron number, subtract atomic number from mass number (written below atomic symbol on periodic table) and then round to nearest whole number. (Because only protons and neutrons count as having mass since electrons are so small).

2. Top number is mass number, and bottom number is atomic number. Remember proton number = electron number = atomic number. Now subtract atomic number from mass number to solve for neutrons.

Answer 2

To anwser question #1, we have to understand first what exactly means "isotope".It is basically the natural variations of an atom that differs in their # of neutrons (0 charge), and an atom will be simply formed by the average weigths of its isotopes , of course considering these different # of neutrons in their nucleus. However, very important to know is that the number of exact number of protons (+ charge)in an atom is the one that is going to give its peculiar characteristics to a kind of atom. Therefore isotpes of the same element only differ in their # of neutrons. For example in a hypothetical element X that has an atomic mass (A) = 42 ,this number will represent the sum of its neutrons and protons; and also will have an atomic number (Z)=20 which will be the # of protons. Therefore A-Z= # of neutrons (42-20p=22 n). But if this atom later on loose an electron (-) or gain an electron it will simply gain an extra positive charge (X+) or negative charge (X-)respectively. But to maintain its own characteristic or to stay as its own atom without becaming some other atom it will have to retain exactly its same number of protons.

Hope it helps

Luis Arrese

Answer 3

If it has a + charge, then it is missing electrons. Example Cl 2+ has two missing electrons.

There are 30 protons. Those make the element what it is and is always constant. There are 35 neutrons. Subtract the top number (isotope) and the bottom (protons) to get the neutrons.

Answer 4

2. The number on top is mass number (A), which is the number of nucleons (protons and neutrons) in an atomic nucleus. The number on the bottom is the atomic number (Z), which is number of protons in an atomic nucleus.

In your example, 30 is the number of protons, and 35 is the number of neutrons.

The number of neutrons are found by subtracting the number of protons (30) from the number of protons + neutrons (65).

Good luck!

Answer 5

1 .Phosphorus is group 5element , Cl is group 7element.It has
7e in the outermost shell.When the reaction takes place,it's oxidation no:is -1,so we can write such Cl-
2.its has 30p and 35 n we can get n by sub: from mass no to
atomic no; here, mass no;is 65 and atomic no;is 30