Answer:
atomic number of Be =4
electronic configuration :1s²2s²
but for Be2+ atomic number = 4-2 =2
electronic configuration : 1s²
Answer:
0.19 kg
8 N
1.964 N
58.86 N
15 kg
Explanation:
w = Weight of an object = 100 N
g = Acceleration due to gravity of Earth = 
m = Mass of an object
Weight is given by
Mass of the object is 0.19 kg
g = 
m = 4 kg
Weight of the object is 8 N.
m = 200 g
Weight of the object is 1.964 N.
Weight is the force the Earth exerts on an object which is on the surface of the Earth.
m = 6kg
The force of the object is 58.86 N.
w = 150 N
a = g = 
Mass of the object is 15 kg.
Answer:
Melamine is used for making tableware,cooking utensils, plates, plastic products etc.
Explanation:
Melamine is used to manufacture many products. How? Well melamine-formaldehyde resin, as it's full name, forms molecular structures that are molded, with heat, to take the shape of the items such as tableware.
After this chemical reaction takes place, the "left over" remains as plastic.
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And so, it is used in products such as cooking utensils, plates, plastic products etc.
There’s lots of measurements. (m, kg, s, mol, cm, in, mm) etc
The metric prefix name for 1/100 is centimeters.
