# Does TC have 7 valence electrons?

## Does TC have 7 valence electrons?

Technetium atoms have 43 electrons and the electronic shell structure is [2, 8, 18, 13, 2] with Atomic Term Symbol (Quantum Numbers) 6S5/2….Technetium Atomic and Orbital Properties.

Atomic Number 43
Valence Electrons 4d5 5s2
Oxidation State -3;-1 1;2;3;4;5;6;7
Atomic Term Symbol (Quantum Numbers) 6S5/2

### Why does chlorine have 7 valence electrons?

The atomic number of chlorine is 17. Hence it has 2 electrons in its inner-most shell, 8 electrons in its second shell and 7 electrons in outer-most shell respectively. Electrons in the outer shells that are not filled are called valence electrons. Hence it has got 7 electrons in its outermost shell.

What is the valence electrons of chlorine?

A: An atom of a group 17 element such as chlorine has seven valence electrons.

How many valence electrons are present in a chloride ion Cl −?

8 valence electrons
Chlorine Ion (Cl⁻) have 18 electrons in their shell. So there are 8 valence electrons.

## What is the electron configuration of TC?

Kr 4d5 5s2
Technetium/Electron configuration

### What is the 21 element?

Scandium
The Elements, sorted by Atomic Number

Atomic Number Symbol Name
20 Ca Calcium
21 Sc Scandium
22 Ti Titanium

How many valence electrons does chlorine need to happy?

Referring to the octet rule, atoms attempt to get a noble gas electron configuration, which is eight valence electrons. Sodium has one valence electron, so giving it up would result in the same electron configuration as neon. Chlorine has seven valence electrons, so if it takes one it will have eight (an octet).

How many valence electrons does chlorine Cl need to be stable?

How many valence electrons does chlorine have? Since it has 7 electrons in its outer-most shell, it needs one more electron to achieve stability or the octet state. Since it needs to add another electron by combining with the atom of another element, it has got a valency of -1.

## What is the relationship between group number and valence electrons?

The group number of the representative elements = the number of valence electrons.

22/03/2021