Subatomic Particles
The negatively charged subatomic particle is called.....
electron
How are elements in the modern periodic table ordered?
By atomic number
This bond shares electrons
Covalent bond
How many electrons can the second & third shell hold?
8
Approximately how many elements are there?
100
Three subatomic particles in an element
Protons, neutrons and electrons
Periods on the periodic table are arranged in this direction
rows
Gaining an electron gives elements this charge
Negative
The number of energy levels in Hydrogen
1
Why did Mendeleev leave gaps in his periodic table?
For elements that had not been discovered yet
Electrons in the outermost shell
valence electrons
Groups
Covalent
Silicon has 14 electrons, how many electrons shells does it have?
3 (2,8,4)
In which group are noble gases on periodic table?
Group 18
0
Group 1 metals are called this
Alkali metals
Metals in group 2 bond with group 16- when they bond they end up with this charge
+2
Name of the rule that is used to describe elements wanting to fill up their outermost shell
Octet
Phosphorus is in column 15, it has this many valence electrons
5
Particles that gives atom its mass
Neutrons and protons
Elements found in group 17 will have this charge when bonding with elements found in group 1.
-1
The total number of energy levels found on the periodic table
7
Number found IN FRONT of a molecule
Coefficient