Since it has 3 protons, look up element #3 in the periodic table. That element happens to be lithium. The specific isotope is lithium-7, where 7 is the sum of 3 + 4. Finally, you may want to look up "Lithium" or "Isotopes of lithium" in the Wikipedia (or in some other online reference) to check whether such an isotope actually exists.
The mass number of an atom is the sum of its protons and neutrons. In this case, the atom has 3 protons and 4 neutrons, so the mass number is 3 + 4 = 7. Electrons do not contribute to the mass number as their mass is negligible compared to protons and neutrons.
With 4 protons, 3 electrons, and 5 neutrons, this atom is an isotope of beryllium. The number of protons in an atom determines its identity, so this atom is still beryllium due to its 4 protons. The difference in neutron number makes it an isotope of beryllium.
For a standard atom, the number of protons, electrons, and neutrons is the same. For example: 2 Protons - 2 Neutrons - 2 Electrons Helium 3 Protons - 3 Neutrons - 3 Electrons Lithium 4 Protons - 4 Neutrons - 4 Electrons Beryllium So... 53 Protons - 53 Neutrons - 53 Electrons Iodine
A hydrogen atom has 1 proton in its nucleus. Since the helium-4 atom has twice as many protons as hydrogen, it has 2 protons. Helium-4 also has 2 neutrons, hence the name "4" representing the total number of protons and neutrons.
The number of protons will always be 3 in each Li atom, and either 3 or 4 neutrons, depending on the Li atom's isotope. 6Li has 3 protons, while 7Li has 4. All other isotopes of Lithium are unstable.
The mass number of an atom is the sum of its protons and neutrons. In this case, the atom has 3 protons and 4 neutrons, so the mass number is 3 + 4 = 7. Electrons do not contribute to the mass number as their mass is negligible compared to protons and neutrons.
This is an easy problem to solve if you have a Periodic Table of Elements.# protons + # neutrons = atomic number3 + 4 = 7The element with the atomic number 7 is Nitrogen.
An atom of lithium isotope 6Li has 3 electrons and 3 protons and 3 neutrons.
With 4 protons, 3 electrons, and 5 neutrons, this atom is an isotope of beryllium. The number of protons in an atom determines its identity, so this atom is still beryllium due to its 4 protons. The difference in neutron number makes it an isotope of beryllium.
Lithium.
10.
seven
Whatever the number of neutrons are in the nucleus is the number of protons. Ex: Neutrons- 4 Protons - 4 Electrons-3 (Which would be an example of a positively charged atom)
Beryllium has 4 protons, 5 neutrons, and 4 electrons
4 protons and about 5 neutrons
4
This is the isotope 7Be.