How Many Electrons Are In BR -?

How many protons and electrons are in BR?

NameBromineAtomic Mass79.904 atomic mass unitsNumber of Protons35Number of Neutrons45Number of Electrons359 more rows.

What group is Br?

Bromine (Br), chemical element, a deep red noxious liquid, and a member of the halogen elements, or Group 17 (Group VIIa) of the periodic table.

Is BR a positive or negative ion?

One positive charge shows that the atom has lost one electron, and one negative charge shows that the atom has gained one electron. Charges of up to + or – 3 or 4 but only for certain atoms….Ions.Atom symbolIon symbolBromineBrBr-1 more row

How many valence electrons are in BR -?

7 valence electrons1 Answer. Valence electrons found in the s and p orbitals of the highest energy. Bromine has an electron configuration of 1s22s22p63s23p64s23d104p5 the valence electrons are in the 4s and 4p orbitals giving Bromine 7 valence electrons. I hope this was helpful.

What is the electron configuration of BR -?

[Ar] 4s² 3d¹⁰ 4p⁵Bromine/Electron configuration

What is the charge of Br?

A bromide is a chemical compound containing a bromide ion or ligand. This is a bromine atom with an ionic charge of −1 (Br−); for example, in caesium bromide, caesium cations (Cs+) are electrically attracted to bromide anions (Br−) to form the electrically neutral ionic compound CsBr.

How many electrons does br need to be stable?

seven electronsBromine is a member of the halogen family of elements. Its companions include fluorine, chlorine, and iodine. Like the other halogens, bromine has seven electrons in its outer shell and is very reactive. You will find bromine in many salt compounds with alkali metals.

How many electrons are in the ion as3 -?

Explanation: Arsenic, As, has atomic number 33, which is the number of protons in the nuclei of its atoms. A neutral As atom would also have 33 electrons.

How many electrons are in each shell?

Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n2) electrons.

What is the atomic number of Br?

35Bromine/Atomic number

Does oxygen gain or lose electrons?

Elements in Groups 15,16 and 17, find it easier to gain electrons than lose them. For example, oxygen atoms gain two electrons to form O2- ions. These have the same electron configuration as the noble gas neon. Elements in Group 14 could lose four, or gain four electrons to achieve a noble gas structure.