Ionic, Covalent Compounds Flashcards
What are the two main types of chemical bonds?
Covalent bonds and Ionic bonds
What occurs in covalent bonds?
Atoms share electrons to reach the electronic configuration of the nearest noble gas
Which type of atoms most often form covalent bonds?
Non-metals
What is an example of a covalent bond?
H2 (hydrogen molecule)
What is the electronic configuration of Sodium (Na)?
2,8,1
What happens during the formation of ionic bonds?
Atoms gain or donate electrons to form ions
What is an example of an ionic bond?
NaCl (sodium chloride)
What charge does Sodium (Na) carry after donating an electron?
Na+
What charge does Chlorine (Cl) carry after accepting an electron?
Cl-
What is valency?
The combining power of an element when it forms ionic compounds or the number of bonds it forms in covalent compounds
How is the valency of an element determined?
From the periodic table
What is the valency of the first group in the periodic table?
1
What is the valency of the second group in the periodic table?
2
What is the valency of the third group in the periodic table?
3
What is the valency of Carbon?
4
What is the valency of Oxygen?
2
What is the valency of Noble gases?
0
Which elements have multiple valencies?
Transition elements
If element A has a valency of 2 and element B has a valency of 1, what is the formula of the compound formed?
AB2
What is the formula for magnesium chloride?
MgCl2
What is the formula for Aluminum oxide?
Al2O3
