Chemistry Notes From Past Papers Flashcards
1
Q
Atoms
A
Atoms with lots of electrons gain to complete their outer shell.
2
Q
Group 1 elements
A
Group 1 elements like sodium have 1 outer shell electron so it’s easier to lose their outer shell.
3
Q
Hydrochloric acid + sodium hydroxide -> sodium chloride + water
A
4
Q
Exothermic
A
Exothermic reactants release heat because the bonds lose energy
5
Q
Endothermic
A
Endothermic reactions take in heat so cool down because the new bonds take in energy.
6
Q
OH-
A
OH- ions always form alkali solutions in water. These are between ph8 and 14 H+ ions always for, acidic solutions in water between pH1 and 6.
