The Periodic Table and Covalent Bonding Flashcards
1
Q
What is covalent bonding between?
A
Two non-metals
2
Q
What does covalent bonding involve?
A
Electron sharing to form a full outer shell.
3
Q
What are the bonds between different covalent molecules?
A
Intermolecular forces
4
Q
What substances have weak intermolecular forces?
A
Substances that have simple molecular structures as they have low mp because they are easy to break apart.
5
Q
Who developed the first periodic table and when?
A
- 1865, Newlands put 56 elements into groups and saw that every 8th element had similar properties
- Wasn’t accepted until 50 years later
6
Q
Who developed Newlands periodic table?
A
- 1869, Mendeleev arranged elements in order in a table and noticed periodic changes in properties.
- Saw gaps in pattern and predicted new elements would be found.
- 1891, table still didn’t contain noble gases
