Top answers

1. Why does the first ionisation energy of atoms generally increase across a period?

As you go across the period, the number of protons increases, however the amount of shielding stays the same, so attraction of outer electrons to nucleus increases and more energy is required to remove an el...
SA
Answered by Safia A. • Chemistry tutor
4971 Views

Determine Ka of a monohydric acid if the pH=2 and the initial concentration is 0.445 mol/L!

First of all we have to determine how much of the acid is dissociated, which we can do by determining the concentration of Hydrogen ions. We can work that out from the pH. pH=2, which means [H + ]=10 -2 mol/...
PN
Answered by Petra N. • Chemistry tutor
2615 Views

What happens to reactivity as you go down group 1 in the periodic table?

As you go down the group, what changes? The number of shells. As you go down the group, what doesn't change? The number of electrons in the outer shell - it is always one. For group 1, they become reactive w...
DV
Answered by Divya V. • Chemistry tutor
10479 Views

Balance the equation and write the products of the following reaction for complete combustion: CH4 + O2 ---> _ + _

Student should know complete combustion produces CO 2 and H 2 O Once products are known, equation can be balanced as: CH 4 + 2O 2 ---> CO 2 + 2H 2 O
AR
Answered by Adam R. • Chemistry tutor
3123 Views

What is electronegativity?

Simple definition: Electronegativity is the tendency of an atom to attract a bonding air of electrons to itself
AR
Answered by Adam R. • Chemistry tutor
3382 Views