Hard water contains high levels of minerals such as magnesium and calcium and can be a real pain to remove if left untreated. When hard water is boiled in an electric kettle, these minerals do not evaporate like the water does but instead remains in the kettle.
Answer:
atomic radius decreased from left to right
electrons in an atom increases
causing the atom to shrink
atom radius increased down a group
additional energy level is added
242 g/mol...... hope it helps :)
Positively charged protons in the nucleus, hope this helps.
Answer:
9,500J
Explanation:
Distance= 50m
Force = 190N
Energy = Force x distance
= 190 x 50
= 9,500J