Uncertainty means that your result may be very random, so you can't trust the first or second or so observation, making several samples critical for accuracy. <span />
Not sure if this is right but I think it’s TRUE sorry if it’s wrong....
Answer:
During a chemical reaction, Bromine (Br) would be expected to <u><em>gain 1 valence electron to have a full octet.</em></u>
Explanation:
In the periodic table the elements are ordered so that those with similar chemical properties are located close to each other.
The elements are arranged in horizontal rows, called periods, which coincide with the last electronic layer of the element. That is, an element with five electronic shells will be in the fifth period.
The columns of the table are called groups. The elements that make up each group coincide in their electronic configuration of valence electrons, that is, they have the same number of electrons in their last.
The elements tend to resemble the closest noble gases in terms of their electronic configuration of the last layer, that is, having eight electrons in the last layer to be stable.
Bromine belongs to group 17 (VII A), which indicates that it has 7 electrons in its last shell. So bromine requires more energy to lose all 7 electrons and generate stability, than it does to gain 1 electron and fill in 8 electrons to be stable. So:
<u><em>During a chemical reaction, Bromine (Br) would be expected to gain 1 valence electron to have a full octet.</em></u>
Well Psychologists are people who are paid to talk to people about their problems or to find out if someone is a danger to themselves or even others. A psychologists investigates the mental state of an individual.
Hope this helps!
Answer:2.69 cm/s
Explanation:
We know that drag force
Fd=6 πμ r v
μ=Dynamic viscosity
r=radius
v=terminal velocity
Bouncy force
Fb= ρ V g
V=volume
At the condition of terminal velocity
when going down ( aluminum)
---------1
when going up ( air)
-----------2
m =mass of object
Divide 1 and 2
divide by 
in R.H.S
