What is the formula for the compound formed by Li+ and S2- ? Grupo de opciones de respuesta

Li2S2

S2Li

SLi

Li2S

LiS

SLi2

What is the formula for the compound formed by Al3+ and O2- ?
Grupo de opciones de respuesta

O2Al3

Al2O3

AlO

Al3O2

OAl

O3Al2
What is the formula for the compound formed by K+ and Cl- ?
Grupo de opciones de respuesta

K2Cl

K2Cl2

KCl2

ClK2

Cl2K

KCl

ClK
What is the formula for the compound formed by Al3+ and Br- ?
Grupo de opciones de respuesta

AlBr3

Br3Al

Br3Al3

Al3Br

Al3Br3

BrAl3

AlBr

BrAl
What is the formula for the compound formed by Na+ and F- ?
Grupo de opciones de respuesta

F2Na

FNa

Na2F

NaF2

NaF

Na2F2

F2Na2

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.