Top answers

Begin to explain some trends across a period of the periodic table.

As you move from group 1 across the periodic table to group 7. The types of bonding change. Consider an element within group 1 - Lithium (Li). This exists as a metal, it has metallic bonding. This means ther...
KO
Answered by Kim O. • Chemistry tutor
3827 Views

Solve: sin(x) = 0.5, in the interval of 0 < x < 360 degree.

sin(x) = 0.5 x = arcsin(0.5) x = 30 degrees , 150 (180-30) degrees
PA
Answered by Priyanka A. • Maths tutor
17860 Views

Explain the general formula for a sraight line?

y=mx+c m = gradient of the line c = the y intercept x and y are variables
NM
Answered by Ndaba M. • Maths tutor
4079 Views

Describe what you would see when a piece of potassium is placed on water. Why does this happen?

THe potassium would move around on the water and fizz. This is because it is an alkali metal that reacts with the water. 2K + 2H2O --&gt; 2KOH + H2. The fizzing is the result of this reaction. Discussion reg...
NM
Answered by Ndaba M. • Chemistry tutor
11209 Views

How do you write a good introduction and conclusion?

In an exam you shouldn't spend too much time on your introduction and conclusion as most of your marks come from the main bulk of the essay. A good place to start with an introduction is looking at the key w...
CN
Answered by Charlotte N. • English tutor
6919 Views