It is expressed in inches,feet,and pounds, centimeters,meters and kilograms in the metric system.(I hope this helps)
Answer:
1 Cu + AgNO3 → Ag + CuNO3
2 Cu + Ag(NO3)2 → Ag + CuNO3
Explanation:
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Answer:8
Everything after the decimal place is a significant figure here
Oh my gosh it’s a lot...I don’t even get this
Explanation:
calcium ion is denoted as - Ca ²⁺
The number of electrons in a neutral atom of calcium = 20 , but since ,
it is charged atom ,
i.e. +2 , the number of electrons in calcium ion = 18 .
From , the question ,
The mass number = 41 ,
and
since ,
the mass number = number of protons + number of neutrons .
number of neutrons = mass number - number of protons
since ,
The number of protons for calcium ion = 20
number of neutrons = 41 - 20 = 21
Hence ,
number of neutrons = 21.
