Does oxygen-18 have 18 protons?

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No. Oxygen always has 8 protons. Oxygen 18 has 8 protons and 10 neutrons (8 + 10 = 18)
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What has 18 protons and 15 electrons?

Ar 3+ . At its neutral state Argon (Ar) has 18 protons and 18 electrons. In order to have 15 electrons it has lost three electrons. Therefore Ar will have a 3+ charge.

Which element has 18 protons?

Argon is the element with 18 protons. The number of protons of any given element is easily accessible by looking at a period table, usually in the upper portion of the squares that represent each of the elements.

Ion symbol for 16 protons and 18 electrons?

Look at the periodic table. You see that the element that has 16 protons is Sulfur. Electrons have a single negative charge, while protons have a single positive charge, so an ion with 2 more electrons than protons will have a charge of 2-. So, the symbol of the ion would be S 2- .

What ion has 20 protons and 18 electrons?

Calcium has an atomic number of 20 meaning it's composition needs 20 protons. By having 20 protons it needs 20 electrons to balance it. So a calcium ion with 18 electrons would be calcium +2.

What chlorine atom has 17 protons and 18 neutrons?

All Chlorine atoms have 17 protons. However, ISOTOPES exist, which are atoms with varying numbers of neutrons. (A Chlorine atom with 17 neutrons would not be considered an isotope, because it has the same number of neutrons as protons) It is impossible to tell how many neutrons a particular atom (MORE)

Which chemical symbol has 17 protons and 18 electrons?

Only neutral elements have the same number or protons and electrons so what you have is an ion. The atomic number of 17 means the element is Chorine but the symbol would be Cl -1 because it has gained an electron.

What is the symbol for an atom with 23 protons 28 neutrons and 18 electrons?

No neutral atom can have the numbers given, because the number of electrons is not equal to the number of protons. An atom or ion of vanadium, chemical symbol V, has 23 protons, and if it also contains 28 neutrons must have the mass number of 23 + 28 = 51. This is the most common isotope of vanadium (MORE)

What element has 18 protons 20 nuetrons and 18 electrons?

The atomic number is the same as the number of protons in an atom of the element. A periodic table or other reference shows that argon is the element with atomic number 18. The atomic mass number is the sum of the numbers of protons and neutrons, 38 in this instance. Therefore, the only actual cor (MORE)

17 protons and 18 electrons?

While "Maybe you should open a science book and find out" is a good idea and makes me laugh, it does not answer the question. The answer is Cl-.

What element has 19 protons and 21 neutrons and 18 electrons?

ONLY the K + ion (not element) has 19 protons and 18 electrons. The isotopic ion with 21 neutrons must be K + -40 , the most rare potassium-ion (0.01%) out of three possibles, the other isotopes are: K + -39 (93%) and 7% is K + -41 Explanation: 39, 40 and 41 are the mass numbers of (MORE)

How may protons neutrons and electrons does oxygen-18 have?

The isotope oxygen-18 has the mass number of 18. The atomic number of oxygen is 8, so all of its atoms, regardless of isotope, have 8 protons. In a neutral oxygen atom the number of protons equals the number of electrons, so it has 8 electrons. The number of neutrons equals the mass number minus the (MORE)