Generalrevision Flashcards
What are covalent bonds?
When two non-metal atoms share a pair of electrons a covalent bond forms.
What are the 3 states of matter?
Solid, liquid and gas
Atoms in covalent bonds share electrons.
True or false.
True
What are ionic bonds
A strong electrostatic force of attraction between two oppositely charged ions is an ionic bond.
What are group 7 atoms known as?
Halogens
If an element is a halogen how many electrons are in its outer shell.
7
What are group 1 atoms known as?
Alkaline metals
Who made the plum pudding model?
J.J Thomson
Group 3 elements have how many shells?
3
Describe the reactivity of group 7 atoms
The more amount of electrons surrounding the valence shell the more shielding they do and that has a less of an attraction in that atom which makes that atom less reactive.
Does the plum pudding model have any protons?
No they weren’t discovered yet
Potassium forms anions.
True or false.
False it forms cations
Who discovered neutrons?
James Chadwick
Who did the gold foil experiment?
Ernest Rutherford
Why did Mendeleev leave gaps in his table?
For the elements that had not been discovered at that time to be found later on.
