Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
|
What is a covalent bond? |
The force of attraction between the nuclei of two atoms and a pair of electrons shared between them. |
|
|
How are atoms held together in a covalent bond? |
There is a strong attraction between the positively charged nuclei of the atoms and the negatively charged pairs of electrons shared between them. |
|
|
What is the chemical formula for methane? |
CH4 |
|
|
What is the chemical formula for ethane? |
C2H6 |
|
|
What type of atoms bond covalently? |
Non-metals |
|
|
How do you work out the charge of an ion? |
The charge of a metal ion = group no. Charge of a non-metal ion = group no.-8 |
|
|
Describe what happens when magnesium reacts with chlorine. |
Electrons transfer from magnesium to chlorine. The magnesium atom loses 2e- to obtain a full outer electron shell. Each of the two chlorine atoms gain 1e- to obtain full outer electron shells. |
|
|
What is the chemical formula for ammonium? |
NH4+ |
|
|
What is the chemical formula for nitrate? |
NO2- |
|
|
What is the chemical formula for hydroxide? |
OH- |
|
|
What is the chemical formula for hydrogen carbonate? |
HCO3- |
|
|
What is the chemical formula for carbonate? |
CO3 2- |
|
|
What is the chemical formula for sulfate? |
SO4 2- |
