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Magnesium (Mg)
Bottom number is the proton number.
Top number is mass number = Protons + Neutrons
Therefore no. of neutrons = Top - Bottom number
In atom proton number = electron number.
However if it was an ion of Mg e.g. Mg+ then its electron number would be 13 and its proton number would be 12.
Hope this will help.
P.S I gave you the extra info as you will now be able to work out WHY!
:D
What else can I help you with?
What element has 4 protons a 4 neutrons?
berylium has 4 protons. It has 4 electrons too.
What element contains 7 electrons and 7 protons?
You should understand that while neutral atoms have the same number of protons and electrons, they do not usually have the same number of protons and valance electrons, because except for hydrogen and helium, atoms also have electrons in the inner shells, which are not valance electrons. Therefore, there is no atom which has 7 protons and 7 valance electrons, although there is an element that has 7 protons, and there are several elements that have 7 valence electrons.
What is the symbol for 2 electrons and 2 protons?
Number protons equal to atomic number. So the element is Helium
What three particles determine which element you have?
An atom of an element is comprised of protons, electrons, and usually neutrons. The specific element is determined by the number of protons, and so there is only one particle that determines the element.
How a proton differ from an element?
Element is made by atom. atoms included many protons,neutrons and electrons.
If an element has 12 protons and 17 neutrons how many electrons must it have?
The number of electrons in a neutral atom is equal to the number of protons, so in this case, the element must have 12 electrons.
What can be said of the number of electrons of the one element can have?
A neutral atom of an element will have the same number of electrons as protons (atomic number). For example, the element magnesium has the atomic number 12, which means that a neutral magnesium atom will have 12 protons and 12 electrons.
What has 11 protons 12 neutrons and 10 electrons?
none because the number of protons and electrons have to be the same.
What element is CU12E7?
This is copper with 12 protons and 7 electrons
If an element has 12 protons and 13 neutrons how many electrons dose it have?
12 electrons. Remember, electrons and protons must be balanced in charge; neutron number may vary.
What on the periodic table has 12 electrons?
Magnesium, Mg, atom number 12, 12 protons and 12 electrons.
The name of the element that has 2 valence electrons and 12 protons?
Magnesium
What is the number of protons neutrons and electrons of carbon 12?
Carbon-12 has 6 protons, 6 neutrons, and 6 electrons. The number of protons determines the element (carbon), the number of neutrons plus protons gives the mass number (12), and in a neutral atom, the number of electrons equals the number of protons.
How many electrons are in Magnesium-25?
Magnesium has an atomic number of 12, so there are 12 protons in any atom of this element. The number of protons do not change if it is an isotope of an element.
How many proton and electrons does the element magnesium have?
Magnesium has an atomic number of 12, therefore it has 12 protons, and therefore 12 electrons.
Is an atom with 12 protons 12 electrons and 12 neutrons an ion?
No, an atom with 12 protons, 12 electrons, and 12 neutrons is not an ion. It is a neutral atom of magnesium, as the number of protons (which determines the element) equals the number of electrons. Ions are charged atoms or molecules that have gained or lost electrons.
If element X has 72 protons how many electrons does it have electrons?
Element X with 72 protons will have 72 electrons in a neutral state. The number of protons in an element is equal to the number of electrons in that element's neutral atom.
