How well can you use your Periodic Table? Which element is in period 2. group 18?
Which element is in period 4. group 2?
Which element is in period 3, group 16
How many protons does an elements atom have that is located in period 4, group 5

2 over 5 and 4 over 15

don’t know last one sorry

step-by-step explanation:

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)

ed sheeran was one of the winners?

step-by-step explanation:

google xd