Answer:
They are arranged by in order by the increasing atomic number.
Explanation:
The horizontal rows are called periods and the vertical columns are called groups.Elements in the same group have similar chemical properties.This is because they have the same number of our electron and the same valency.
Hope this helps!
B. Solve
1. A bus covers a distance of 90 km at a uniform speed. Had the speed been 15 km/hour more it
would have taken 30 minutes less for the journey. Find the original speed of the bus.
Answer:
45 km/hr
Explanation:
total distance = 90
Increased speed = x+15
90/x - 90/x+15=1/2
90(1/x - 1/x+15)=1/2
90(x+15-x/x^2+15x)=1/2
equation is:
x^2+15x-2700=0
x^2+60x-45x-2700=0
x(x+60)-45(x+60)=0
(x+60)(x-45)=0
x= -60, x=45
reject the negative value = -60
usual speed=45 km/ hr
Which group of European colonists did NOT receive any aid from the Trustees?
Answer:
The Malcontents
Explanation: