Looking at the periodic table, determine the number of valence electrons present in a following neutral atoms.
Column A
1.
Oxygen (O):
Oxygen (O)
2.
Aluminium (Al):
Aluminium (Al)
3.
Neon (Ne):
Neon (Ne)
4.
Silicion (Si):
Silicion (Si)
5.
Magnesium (Mg):
Magnesium (Mg)
6.
Iodine (I):
Iodine (I)
7.
Lithium (Li):
Lithium (Li)
8.
Nitrogen (N):
Nitrogen (N)
Column B
a.4 valence electrons
b.3 valence electrons
c.8 valence electrons
d.1 valence electrons
e.5 valence electrons
f.6 valence electrons
g.2 valence electrons
h.7 valence electrons
1. Oxygen (O):
Number of valence electrons: 6 (g)
2. Aluminium (Al):
Number of valence electrons: 3 (b)
3. Neon (Ne):
Number of valence electrons: 8 (c)
4. Silicon (Si):
Number of valence electrons: 4 (a)
5. Magnesium (Mg):
Number of valence electrons: 2 (g)
6. Iodine (I):
Number of valence electrons: 7 (h)
7. Lithium (Li):
Number of valence electrons: 1 (d)
8. Nitrogen (N):
Number of valence electrons: 5 (e)
Column A:
1. Oxygen (O): 6 valence electrons (f)
2. Aluminium (Al): 3 valence electrons (b)
3. Neon (Ne): 8 valence electrons (c)
4. Silicon (Si): 4 valence electrons (a)
5. Magnesium (Mg): 2 valence electrons (g)
6. Iodine (I): 7 valence electrons (h)
7. Lithium (Li): 1 valence electron (d)
8. Nitrogen (N): 5 valence electrons (e)
To determine the number of valence electrons in an element, you need to look at its position on the periodic table. Valence electrons are the electrons found in the outermost energy level of an atom.
Now, let's determine the number of valence electrons for each element:
1. Oxygen (O): Oxygen is located in Group 16 of the periodic table. Elements in Group 16 have 6 valence electrons. So, the answer is option f. 6 valence electrons.
2. Aluminium (Al): Aluminium is located in Group 13 of the periodic table. Elements in Group 13 have 3 valence electrons. So, the answer is option b. 3 valence electrons.
3. Neon (Ne): Neon is located in Group 18 of the periodic table. Elements in Group 18 have 8 valence electrons, except for helium which has 2. So, the answer is option c. 8 valence electrons.
4. Silicon (Si): Silicon is located in Group 14 of the periodic table. Elements in Group 14 have 4 valence electrons. So, the answer is option a. 4 valence electrons.
5. Magnesium (Mg): Magnesium is located in Group 2 of the periodic table. Elements in Group 2 have 2 valence electrons. So, the answer is option g. 2 valence electrons.
6. Iodine (I): Iodine is located in Group 17 of the periodic table. Elements in Group 17 have 7 valence electrons, except for helium which has 1. So, the answer is option h. 7 valence electrons.
7. Lithium (Li): Lithium is located in Group 1 of the periodic table. Elements in Group 1 have 1 valence electron. So, the answer is option d. 1 valence electron.
8. Nitrogen (N): Nitrogen is located in Group 15 of the periodic table. Elements in Group 15 have 5 valence electrons. So, the answer is option e. 5 valence electrons.