They are called Periods. Lesser known as series
Answer:
10.1 ms^-2
Explanation:
From;
v = u + at
v = final velocity
u = initial velocity
a= acceleration
t = time taken
To convert the velocity from Km/hr to m/s we us;
x * 1000/3600
Where x is the velocity in Km/hr
So;
799 * 1000/3600 = 221.9 m/s
11325 * 1000/3600 = 3145.8 m/s
4.8 minutes = 4.8 * 60 = 288 s
Applying the formula;
a= v - u/t
a = 3145.8 - 221.9/288
a = 10.1 ms^-2
The answers to this problem is C
Answer:
Three hydrogen atoms to form PH₃.
Explanation:
Hello!
In this case, since the elements belonging to the nitrogen family (N, P, As, Sb and Bi) show five valence electrons, because there are five electrons at their outer shell, it is clear that if phosphorous bonds with hydrogen, it is going to require the same amount of oxygen atoms (3) because elements having five valence electrons need 3 bonds in order to attain the octet (5+3=8).
Therefore the compound would be:

Which is phosphine.
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