# 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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# How many neutrons if number of protons is 18 mass is 37.8?

there is amount of proton = amount of electron. and the mass = amount of proton + amount of neutron. so we take the mass - amount of pronton we will get the amount of neutron =20.8

# What is the symbol for an ion with 16 protons 18 neutrons and 18 electrons?

S for sulfur because the number of protons tells you the atomic number with is 16 and 16 is sulfur. The electrons means it is an ion with two more electrons than protons. The neutrons have no charge but add mass to the element.

# Why do chlorine atoms only have 17 protons and does a chlorine atom exist with 18 protons?

The number of protons is an atom's defining characteristic. Those 17 protons are what gives chlorine the properties of chlorine. With 18 protons it would be not chlorine, but would be argon.

# What is the symbol for an ion having 15 protons and 18 electrons?

15 protons is a dead giveaway that we're dealing with phosphorus (it is atomic number 15). 18 electrons means it has 3 extra (18-15 = 3) electrons, each electron has a -1 charge, so we have 3 extra -1 charges... So putting it all together we get: P 3-

# If an atom has 14 protons 10 neutrons and 18 electrons what is the electrical charge?

Protons have a +1 charge. Electrons have a -1 charge. Neutrons are neutral, therefore this atom as described will have a -4 charge.

# What element has 16 protons 16 neutrons and 18 electrons?

SULFUR has 16 protons. But no neutral atom of an element can have MORE Electrons than Protons. This means that NO element can have 16 Protons and 18 Electrons.

# What can you when you are 18?

When you're 18 most people finish college and they say they are gonna move out.

# 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.

# The isotope oxygen-18 has 18 protons?

No - O-18 has 8 protons and 10 neutrons for total in the nucleus of 18

# 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- .

# If an atom has 20 protons and 18 electrons what is its charge?

That particular atom will have a positive two (+2) charge. Charged atoms are more commonly known as ions.

# Which ion has 17 protons 18 neutrons 18 electrons?

A chloride ion (of the isotope 35 Cl) with a charge of -1. The 17 protons tell you its chlorine and since there is one more electron than proton it has a charge.

# What ion has 17 protons and 18 electrons?

The ion that has 17 protons and 18 electrons is a chlorine ion.This chlorine ion also has 18 neutrons.

# An atom has 15 protons and 18 neutrons How many electrons does it have?

If the atom is neutral, then it will have 15 electrons to balance the 15 protons.

# What ion contains 19 protons 20 neutrons 18 electrons?

The ion is K + also known as Potassium Melting Point: 63.65 Ã‚Â°C (336.8 K, 146.57 Ã‚Â°F) Boiling Point: 774.0 Ã‚Â°C (1047.15 K, 1425.2 Ã‚Â°F)

# How many electrons does an element have if it has 17 protons and 18 neutrons?

An element with 17 protons and 18 neutrons would have 17 electronsif it was neutral.

# 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 ( Full Answer )

# What is the ion charge of an atom with 15 protons and 18 electrons?

The ion charge is minus three. Electrons are negatively charged and there are three more of them than of the oppositely charged protons.

# 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 ( Full Answer )

# 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 ( Full Answer )

# What is the full symbol for the atom or ion with 17 protons 18 neutrons and 16 electrons?

Chlorine is the element with 17 protons, and it is a positive ion with a 1+ charge, so the symbol would be 35-Cl + . This is very unusual for chlorine, as it nearly always forms negative ions.

# 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-.

# Why do you have to be 18?

Because that's a part of life. You Have to be 18 so u can vote, drive, etc.

# Sulfur with 16 protons 18 neutrons and 18 electrons what is its mass number?

Mass number is always the sum of the numbers of protons and neutrons; in this instance, 34.

# What atom has 17 protons 16 electrons and 18 neutrons?

It is NOT an atom but a 1+ ion of Chlorine Cl + (atomnumber 17, massnumber 17+18=35) isotope 35.

# What is the element that has the most protons of any element in group 18?

Radon (Rn) has the most protons of any element in Group 0 (18) with 86 protons. However, if or when Ununoctium is officially confirmed, that will become the element with most protons in that family, with 118 protons.

# What element has 22 protons 24 neutrons and 18 electrons?

There isn't an element, because the amount of electrons has to be equal to the amount of protons in an element.

# 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 ( Full Answer )

# How many protons does fluorine-18 have?

An atom's atomic number gives its number of protons. Fluorine's atomic number is 9. Thus, it has 9 protons, regardless of isotope.

# What is the formula for the ion which has 1 protons and 18 electrons?

Such an ion will be very, very im possible! H 17- would have 1 proton (charged +1) and 18 electrons (charged -18) with net charge 17-

# What has 19 protons and 18 electrons?

Ionof Element number 19 is the potassium ion: K + Since 19(p + ) - 18(e - ) = 1 +

# What is the charge of the phosphorus ion that has 15 protons and 18 electrons?

Well, it must be 3 - , because 18 negatively charged electrons is three more than 15 positively charged protons.

# What isotope has 18 protons and 22 neutrons?

Argon (Ar)....Argon has 18 protons as shown by the periodic table...And 18+22=40, which is the atomic weight of Argon

# What is the element with 18 protons 18 neutrons and 17 electrons?

Argon cation Ar + , atomic number 18, mass number 36 and 17 electrons. However this does not exist, argon can not easily be put in cationic ( + ) state.

# What is the mass number of an atom with 18 protons 22 neutrons and 18 electrons?

The number of protons = atomic number. The element with atomic number 18 on the periodic chart is argon.

# Which atom will produce an ion with 15 protons 16 neutrons and 18 electrons?

A phosphorus atoms has 15 protons and will form an ion with 18 electrons. Phosphorus-31 is one of the isotopes.

# What isotopes contain 18 protons and 22 neutrons?

Only one isotope has a given number of protons andneutrons. In this case it is Argon-40

# What is the charge of an ion that has 18 protons and 17 electrons?

protons and electrons are equally charged except that protons are positively charged and electrons are negatively charged, as there are more protons in this example there is a positive net charge

# What element has 18 protons 20 nuetrons and 18 electrons What is its atomic number?

The atomic number of am element is determined by its number of either electrons or protons, hence here, it is 18. Therefore the element must be argon which the isotope has mass number 38, as there are 18 protons and 20 neutrons.

# What is the mass number if this element has 17 protons and 18 neutrons?

The mass number is the sum of neutrons and protons. Thus, if there are 17 protons and 18 neutrons, the mass number is 35.

# What is the symbol for an ion with 17 protons and 18 electrons?

The 17 protons tells us that this element is Chlorine, since atomic number is the number of protons. The additional electron means that the chloride ion has a charge of 1 - . So the symbol for the chloride ion is Cl - .

# How many protons are present in a O-18 isotope?

The atomic number of oxygen is 8. So it has 8 protons. And O-18 isotope has 10 neutrons.

# What atom has 18 electrons and 19 protons?

The Potassium 1+ ion. Potassium 1+ acts like argon a little with the number of electrons.

# Do Oxygen-17 and oxygen-18 have different number of protons?

No, 17 O and 18 O have differing numbers of neutrons , which make them isotopes of oxygen, along with 16 O.

# 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 ( Full Answer )

# What is the symbol for an ion which has 20 protons and 18 electrons?

20 protons indicate that the particle has an atomic number of 20 and is thus, calcium Ca. Since it has two more protons than it has electrons it must have a charge of 2+. So, the symbol will be Ca 2+ .

# What ion has 20 protons 26 electrons and 18 neutrons?

This would be isotope 43 Ca with an oxidation state of-6, which seems unlikely since Ca has oxidation states of +2 and+1, with the former being more common. Please see the links.