Question

If an electro neutral has an atomic number 20 and mass 40 find the amount of p,n,e and the name of element

Answer 1

p+=20

e-=20

n⁰=40-20=20

Answer 2

An element with an atomic number of 20 is calcium (Ca). To determine the number of protons (p), neutrons (n), and electrons (e), you can use the atomic number and the atomic mass.

1. Atomic number (Z) represents the number of protons, so in the case of calcium, it's 20.

2. The atomic mass (A) of 40 represents the combined number of protons and neutrons in the nucleus. Since calcium has 20 protons (as given by the atomic number), you can find the number of neutrons (n) by subtracting the number of protons from the atomic mass: n = A - Z n = 40 - 20 n = 20

So, calcium (Ca) has 20 protons, 20 neutrons, and 20 electrons.

It's an electro-neutral atom because the number of protons (positively charged) is equal to the number of electrons (negatively charged), resulting in a neutral overall charge.