# FAQ: The atomic number of oxygen is 8. What is the mass number of an oxygen atom with 7 neutrons?

## What is the mass number of oxygen 8?

Name Oxygen
Symbol O
Atomic Number 8
Atomic Mass 15.999 atomic mass units
Number of Protons 8

## What is the mass number of an oxygen atom with 7 neutrons?

The mass number of an oxygen atom with seven neutrons would be 15 and would be an atom of the oxygen- 15 isotope.

## How do you find the mass number of oxygen?

The most common Isotope is found by rounding the Weighted average found on the periodic table to the nearest whole number. In this case Oxygen has a Weighted Average Atomic Mass of 15.999 AMU. So the Mass Number is 16.

## What is the mass number for an atom of oxygen with 8 neutrons in the nucleus?

Oxygen -16 (16O) is a stable isotope of oxygen, having 8 neutrons and 8 protons in its nucleus. It has a mass of 15.99491461956 u.

## Why can’t oxygen have 9 protons?

An oxygen atom has 8 protons in its nucleus. Why can’t it have 9 protons? Because then it would not be an oxygen atom. Oxygen is defined as “an atom having 8 protons in the nucleus.” Atoms having 9 protons in the nucleus are called “fluorine.”

## What is the mass number for an oxygen atom with 10 neutrons?

What is the mass number for an oxygen atom that has 10 neutrons in its nucleus? mass # 18.

## How do you write an oxygen atom with 10 neutrons?

Isotope Geochemistry Isotopes are forms of a chemical element that have the same atomic number but differ in mass. 16O → 8 protons + 8 neutrons; a “light” oxygen ); The relative amounts are expressed as either 18O/16O or δ 18O Oxygen – 18 (aka 18O → 8 protons + 10 neutrons; a “heavy” oxygen ).

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## What is the mass of 5 oxygen atoms?

Therefore, 5 moles × 32.0 g/mol = 160 grams is the mass (m) when there are 5 moles of O2. (I’m so sorry if my explanation is too long, but I’m trying my best so you could understand.)

## What is the mass number of an oxygen isotope that has 9 Neutrons?

Answer: The mass number of an oxygen isotope that has nine neutrons is 17 and isotope is called as Oxygen -17. Explanation: Atomic number is defined as the number of protons or number of electrons that are present in an atom.

## How do we calculate atomic mass?

For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit (amu). By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atom.

## Why does oxygen have 8 neutrons?

Oxygen with the symbol O has the atomic number 8 which means it is the 8th element in the table. The number eight also means that oxygen has eight protons in the nucleus.

## Why is oxygen atomic number 8?

On the periodic table of elements, oxygen is represented by the symbol O. It has an atomic number of 8 because it has 8 protons in its nucleus.

## What if the atom has more than 8 protons is it still an oxygen?

Having too many neutrons, or too few, will make the oxygen isotope radioactive, but still oxygen. Answer 6: Oxygen is # 8 in the periodic table. That means it has 8 protons and 8 electrons.

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