Answer:
Number of Protons = 20
Number of Electrons = 20
Number of Neutrons = 23
Explanation:
Number of Protons:
As the number of protons present in the nucleus are equal to the atomic number therefore, using periodic table one can easily find out the atomic number of Ca atom. Hence, Ca is present in group 2 and period 4 and having an atomic number of 20. Therefore, number of protons in Ca atom are 20.
Number of Electrons:
As shown in statement, Ca is not carrying any type of charge. It means this atom is neutral in nature. Which means, it is carrying the same number of electrons as the number of protons in order to give a neutral atom. Therefore, it contains 20 electrons.
Number of Neutrons:
Number of neutrons can be calculated using following formula,
No. of Neutrons = Atomic Mass - Number of Protons
As,
Atomic Mass = 43
So,
No. of Neutrons = 43 - 20
No. of Neutrons = 23
A gardener can fix acidic soil by adding lime over time.
Answer:
<h2>The answer is 870 miles</h2>
Explanation:
The distance covered by an object given it's velocity and time taken can be found by using the formula
<h3>distance = velocity × time </h3>
From the question
velocity = 290 miles/hour
time = 3 hours
The distance between the two cities is
distance = 290 × 3
We have the final answer as
<h3>870 miles</h3>
Hope this helps you
Answer:
350mmHg
Explanation:
Use Dalton law
Total=P gas 1+p gas 2+ P gas 3
825=P1+350+125
825=P1+475
825-475= P1
P1= 350 mm Hg