Elements are determined by their number of protons. Nitrogen has 7 protons but usually 7 neutrons as well. What you have here is a nitrogen isotope, an element with more or less neutrons than there are protons. Specifically, this is Nitrogen-15.
The element with 7 electrons, 7 protons, and 8 neutrons is nitrogen-15 (15N).
An atom with 7 protons, 8 neutrons, and 7 electrons is a nitrogen atom (atomic number 7). The number of protons determines the element, and in this case, it is nitrogen. The neutron count can vary within isotopes of the same element, and the electrons would normally balance the charge of the protons to keep the atom neutral.
The element that has 8 protons and 8 neutrons is oxygen.
"Dalton" in this context has the same meaning as "atomic mass unit". Each proton and each neutron has one Dalton, while electrons have none. Therefore, the element in question has 16 daltons, and is in fact an atom of the most common isotope of oxygen, oxygen-16.
There are 8 neutrons in oxygen. You can determine the number of neutrons in any element by subtracting the atomic number (which is 8 for oxygen) from the atomic mass, rounded to the nearest whole number (which is 16 for oxygen). This is because the mass of any element comes mainly from the protons and the neutrons - the mass of the electrons is too tiny to be a significant contribution. The atomic number corresponds to the number of protons in an element, so when you subtract it from the element's total mass, you are left with the number of neutrons.
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Any element with 7 protons would be Nitrogen
The element with 7 electrons, 7 protons, and 8 neutrons is nitrogen-15 (15N).
The element with 8 protons is oxygen. To determine the name of the isotope with 9 neutrons, the number of neutrons added to the number of protons gives oxygen-17 which is called oxygen-17.
7 neutrons + 8 protons = mass number of 15
oxygen
An atom with 7 protons, 8 neutrons, and 7 electrons is a nitrogen atom (atomic number 7). The number of protons determines the element, and in this case, it is nitrogen. The neutron count can vary within isotopes of the same element, and the electrons would normally balance the charge of the protons to keep the atom neutral.
Oxygen has 8 protons and Nitrogen has 7 protons the atomic number of an element which tell you how many protons an atom has is the lower one seen on each element on the periodic table.
A positively charged ion of oxygen
The element that has 8 protons and 8 neutrons is oxygen.
4 - protons (so it is beryllium) 5 - neutrons, therefore, it is beryllium-9 (4+5 is nine)
No, carbon can not have 8 protons. The number of protons in an element can not vary. Carbon can only have 6 protons (the atomic number). If an element has 8 protons, it is oxygen.