Answer :
In summary, the number of valence electrons are:
- C: 4
- Mg: 2
- O: 6
- Xe: 8
To determine the number of valence electrons for each atom, you need to look at their position in the periodic table and their electron configuration. Here is a step-by-step breakdown for each given atom:
1. Carbon (C)
Carbon is in group 14 of the periodic table.
Its electron configuration is 1s² 2s² 2p².
The valence electrons are those in the outermost shell, which are 2s² 2p².
So, Carbon has 4 valence electrons.
2. Magnesium (Mg)
Magnesium is in group 2 of the periodic table.
Its electron configuration is 1s² 2s² 2p⁶ 3s².
The valence electrons are those in the outermost shell, which is 3s².
So, Magnesium has 2 valence electrons.
3. Oxygen (O)
Oxygen is in group 16 of the periodic table.
Its electron configuration is 1s² 2s² 2p⁴.
The valence electrons are those in the outermost shell, which are 2s² 2p⁴.
So, Oxygen has 6 valence electrons.
4. Xenon (Xe)
Xenon is in group 18 of the periodic table.
Its electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶.
The valence electrons are those in the outermost shell, which is 5p⁶.
So, Xenon has 8 valence electrons.
For example, if an atom has two valence electrons, enter the number 2.
C: 4
Mg: 2
O: 6
Xe: 8
Valence electrons are the electrons in the outermost energy level of an atom that are involved in chemical bonding. These electrons determine the reactivity and chemical properties of an element. The number of valence electrons an atom has can be determined by its position on the periodic table.
Elements in the same group or column on the periodic table have the same number of valence electrons. For example, all elements in Group 1 (the alkali metals) have one valence electron, while elements in Group 18 (the noble gases) have eight valence electrons except for helium which has only two valence electrons. The valence electrons are important for chemical reactions because they are the electrons that are available for sharing or transfer to form chemical bonds.
To learn more about Valence electrons visit here:
brainly.com/question/28977387
#SPJ4
