Nickel (Ni) 18. This element has an atomic number that is double the atomic number of silicon. 19. This element has more valence electrons than oxygen, fewer valence electrons than neon, more protons than 18 sodium, but fewer protons than argon.
Which element has more valence electrons neon or oxygen?
Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons). Examples include neon (Ne), argon (Ar), and krypton (Kr). Oxygen, like all the other elements in group 16, has six valence electrons.
Which element has the highest valence?
| Compound | Chlorine | Formula | Cl 2 | Valence | Cl = 1 | Oxidation state | Cl = 0 |
|---|
What element has one more electron than bromine?
In other words, chlorine has a higher electron affinity than bromine.
What elements has 7 valence electrons?
Any element in the halogen group will have seven valence electrons. These elements include fluorine, chlorine, bromine, iodine, and astatine .
What has an atomic number of 12?
| Atomic Number Symbol Name | 12 Mg Magnesium | 13 Al Aluminum | 14 Si Silicon | 15 P Phosphorus |
|---|
How many valence electrons are in an atom of K?
The number of valence electrons is what determined the reactivity of an atom. K is the symbol for potassium, and the number of valence electron can be found through its’ group on the periodic table. Hence, it has one valence electron .
Why valency of scandium is 3?
Valency of Scandium – Atomic number of scandium is 21. It is also a transition element but it doesn’t show variable valences. Its electronic configuration is Ar 3d1 4s 2. So, its valency is 3.
What’s the valence of oxygen?
Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.
Why valency of beryllium is 2?
Valence electrons are the electrons in the outermost shell of an atom. For example, Beryllium can bond with oxygen and donates those 2 electrons to oxygen to combine with oxygen, which has 6 valence electrons. After this, Be will have a charge of 2+ and oxygen will have a charge of 2-.
Which is smaller Cl or Br?
As Br is smaller than Cl ; therefore, Br- have a smaller ionization energy than Cl-. In short, since the outermost electron in bromine is farther from the nucleus than the outermost electron in chloride, it takes less energy to remove the outermost electron in bromide.
What is the symbol of uranium?
Uranium is in the periodic table that has a symbol U and atomic number 92. It also has the highest atomic weight of the naturally occurring elements. Uranium is atomic number 92 and can have different numbers of neutrons in the nucleus from 141 to 146.
Is CL more reactive than Br?
Why: Chlorine is more reactive the bromine because chlorine radical is less stable then bromine radical.
Why does group 17 have 7 valence electrons?
Chemical Properties of Halogens
Because all halogens have seven valence electrons, they are “eager” to gain one more electron . Doing so gives them a full outer energy level, which is the most stable arrangement of electrons. Halogens often combine with alkali metals in group 1 of the periodic table.
What is the only metalloid with 7 valence electrons?
The elements in this family are fluorine, chlorine, bromine, iodine, and astatine. Halogens have 7 valence electrons, which explains why they are the most active non-metals.
Which element has 4 energy levels and 7 valence electrons?
| Element Element Number Number of Electrons in each Level | Carbon 6 4 | Nitrogen 7 5 | Oxygen 8 6 | Fluorine 9 7 |
|---|
