2 Bonding 1 Flashcards
What charge do electrons have?
-1
What charge will an ion of lithium take?
1+ (one electron in the outer shell, needs to lose it)
What charge will an ion of beryllium take?
2+ (two electrons in the outer shell, needs to lose them both)
What charge will an ion of barium take?
2+ (group 2 so two electrons in the outer shell, needs to lose them both)
What charge will an ion of fluorine take?
1- (7 electrons in the outer shell, needs to gain one)
If something has gained electrons, what charge will it have?
Negative
If something has lost electrons, what charge will it have?
Positive (because electrons have a negative charge so they have lost a negative!)
What charge will an ion of oxygen take?
2- (6 electrons in outer shell so needs to gain two)
What charge will an ion of Selenium take?
2- (group 6, so has 6 electrons in the outer shell and needs to gain two)
Explain in terms of electrons what occurs when lithium bonds with chlorine
One electron transferred from lithium to chlorine
Why do atoms transfer electrons in ionic bonding?
So that they can have full outer shells
Explain in terms of electrons what occurs when lithium bonds with fluorine
One electron transferred from lithium to fluorine. Lithium gains a +1 charge and the fluorine gains a -1 charge to become a fluoride ion.
Explain in terms of electrons what occurs when magnesium bonds with oxygen
Two electrons transferred from magnesium to oxygen. Magnesium gains a 2+ charge and Oxygen gains a 2- charge.
Explain in terms of electrons what occurs when beryllium bonds with oxygen (3 marks)
Two electrons transferred from beryllium to oxygen. Be gains a 2+ charge and oxygen gains a 2- charge.
Explain in terms of electrons what occurs when magnesium bonds with chlorine
Magnesium loses 2 electrons and gains a 2+ charge. Each electron is transferred to a different chlorine atom, so both chlorine atoms gain 1 electron, each gaining a -1 charge.
