An element has an ion with +2 charge.It has 38 electrons and 51 neutrons. write the nuclear symbol for the element.
The question could have been worded more clearly. It isn't completely clear whether "it" refers to the ion or to the element. My response below assumes the ION has 38 electrons.
The ion has 38 electrons and with a +2 charge for the ion it must have had 40 initially. Look up element #40 in the periodic table. The mass number of number of protons + number of neutrons.
To write the nuclear symbol for the element, we need to include the atomic number (number of protons) and the mass number (number of protons + neutrons).
Given that the ion has a +2 charge, it means it has lost 2 electrons. Therefore, the number of protons in the atom is 38 + 2 = 40.
The mass number is the sum of the number of protons and neutrons, which is 40 (protons) + 51 (neutrons) = 91.
Thus, the nuclear symbol for the element is:
Mass number
Symbol
Atomic number
91
X
40
Note: "X" represents the symbol of the element, which is unknown based on the given information.
To write the nuclear symbol for the element, you need to know the element's symbol, atomic number, and mass number.
Given information:
Number of electrons = 38
Number of neutrons = 51
Ion charge = +2
1. Start by finding the atomic number: The atomic number represents the number of protons in the nucleus of an atom. In a neutral atom, the number of protons is equal to the number of electrons. Since the ion has a +2 charge, it means it lost two electrons. So, to find the atomic number, subtract the ion charge (+2) from the number of electrons (38 - 2 = 36).
Atomic Number: 36
2. The mass number of an element is the sum of protons and neutrons in the nucleus. To find the mass number, add the number of protons (atomic number) and the number of neutrons.
Mass Number: Atomic Number (protons) + number of neutrons
Mass Number: 36 + 51 = 87
3. Determine the element symbol: In this case, since we are not given the symbol directly, we can refer to the periodic table. The element with atomic number 36 is Krypton (Kr).
Element Symbol: Kr
Now let's write the nuclear symbol for the element:
The nuclear symbol is typically represented as follows:
mass number
X
atomic number
Therefore, the nuclear symbol for the element with a +2 charge, 38 electrons, and 51 neutrons can be written as:
87
Kr