Energy
Reactions that release energy into the environment
Exothermic
The type of covalent bond formed in chlorine and hydrogen and hydrogen chloride
Single
+1
Who discovered the electron and came up with the plum pudding model?
JJ Thompson
What acids make sulphates?
Sulphuric
Reactions that absorb energy from the environment
What is endothermic?
The type of covalent bond formed in nitrogen
What is a triple bond?
Ions formed by halogens
-1
Who discovered the neutron 20 years after the nucleus?
James Chadwick
What acids make nitrates?
Nitric
Hand warmer are exothermic. True of false
True
The type of covalent bond formed in oxygen and carbon dioxide.
What is a double bond?
Ions formed by magnesium
+2
How many neutrons does oxygen have?
6
Acid + Alkali --> Salt + ?????
Water
The minimum amount of kinetic energy particles need to have in order to react
What is activation energy?
The number of covalent bonds in methane
What is 4?
Ions formed by oxygen
2-
What do isotopes have different numbers of?
Neutrons
Acid + Carbonate --> Salt + Water + ?????
Carbon dioxide
Commonly used endothermic reaction
Sports ice packs
Three substances with giant covalent structures
Diamond, graphite, silicon dioxide
How many electrons in the outer shell of argon, krypton and neon?
8
What happened to 99.99% of the alpha particles fired at the gold foil?
They passed straight through
Hydrochloric acid + Magnesium --> ????? + ?????
Magnesium chloride + Hydrogen