Question

calculate tha no. of electrons which will together weight one gram​

Answer 1

Answer :-

1.098 × 10²⁷

Explanation :-

Mass of 1 electron = 9.1 × 10⁻²⁸g

Let the number of electrons be x

So,

• 1 electron = 9.1 × 10⁻²⁸g
• x electrons = 1 g

Now we have,

$\tt{x = \dfrac{1}{9.1 \times 10^{ - 28}} }$

⇒ x = 0.1098 × 10²⁸

⇒ x = 1.098 × 10²⁷

EXTRA INFORMATION:

★ An atom contains nucleus and Electrons.

★ Inside the Nucleus, protons and neutrons are present.

★ Mass Number = Number of protons + Number of neutrons