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for that you should have the knowledge of the electron configuration
2,8,8,18,32,..
meaning first electronic orbit can have at the most two electrons.
second orbit can have only 8 electrons and so on....
Now, for example calcium atomic number is 20 .
so how will be the electrons placed
2 will go in the first orbit, 8 will go in the second orbit - so till now total is 10 we still have 10 more electrons to arrange.
8 electrons go in the third orbit and last 2 electrons go in the fourth orbit which actually has the capacity to accept total of 18 - now 2 electrons come in the fourth orbit so 18-2=16 . for any element it requires a lot of energy to get 16 electrons from the atom of other element so it will be better to loose 2 electrons for the calcium atom. Ca +2 means it has 2 electrons to loose . try this with different element and if you have any problem I will help you
What else can I help you with?
Would a chlorine atom lose electrons or gain electrons to become an atom?
A chlorine atom would gain one electron to become an ion because it tends to achieve a stable electron configuration by having a full outer shell of electrons.
Would a magnesium atom prefer to lose or gain electrons?
Magnesium is in the second group (column) of the periodic table, so it has two valence electrons or electrons in its outer shell. so in order for it to fulfill the octet rule (get eight electrons in its valence shell most of the time), then it would rather lose two electrons and have a full valence shell than gain six electrons.
What is an oxidation number and how is it related to Valence Electrons?
An oxidation number is a measure of the charge that an atom would have if the bonding were ionic. It indicates the number of electrons that an atom would gain or lose in a chemical reaction. Valence electrons are the outermost electrons in an atom’s electron cloud and play a key role in determining the oxidation number of an atom.
If an atom gains electrons its electrical charge is?
Negative, assuming that the gain of electrons was an ionizing gain (not just replacing missing electrons)
Would an atoms with 3 electrons in level m tend to gain or loose electrons?
An atom with 3 electrons in level M would tend to either gain 5 electrons to complete level M or lose 3 electrons to complete the previous level. The tendency would depend on the element and its electronegativity.
Would a chlorine atom lose electrons or gain electrons to become an atom?
A chlorine atom would gain one electron to become an ion because it tends to achieve a stable electron configuration by having a full outer shell of electrons.
Would atom with an atomic number of 3 lose or gain electrons?
Lithium loses electrons.
When will an atom be electronegative?
An electronegative atom gain electrons.
How would an atom of oxygen fill its outermost energy level?
It would gain 2 electrons.
What is the number of electrons an atom would gain or loose when forming ionic bonds?
The number of electrons is specific for each element.
Would a magnesium atom prefer to lose or gain electrons?
Magnesium is in the second group (column) of the periodic table, so it has two valence electrons or electrons in its outer shell. so in order for it to fulfill the octet rule (get eight electrons in its valence shell most of the time), then it would rather lose two electrons and have a full valence shell than gain six electrons.
What is an oxidation number and how is it related to Valence Electrons?
An oxidation number is a measure of the charge that an atom would have if the bonding were ionic. It indicates the number of electrons that an atom would gain or lose in a chemical reaction. Valence electrons are the outermost electrons in an atom’s electron cloud and play a key role in determining the oxidation number of an atom.
How many electrons would a carbon atom have to gain to fill it's outmost level?
Four.
What does a sulfur atom need to do to become an ion?
It needs to lose, or gain, electrons.
How many electrons does a nitrogen atom need to gain in order to attrain a noble-gas?
A nitrogen atom needs to gain three electrons to achieve a stable electron configuration similar to a noble gas. This would result in the nitrogen atom having a full outer electron shell, like that of a noble gas.
If an atom gains electrons its electrical charge is?
Negative, assuming that the gain of electrons was an ionizing gain (not just replacing missing electrons)
How the charge of an atom changes?
The gain and/or lose of electrons.
