Question

Please tell me these answers​

Answer 1

Answer:

• centaly ,concentrate

Explanation:

i konw only one answer sorry

Answer 2

All the answers are below

1. Nucleus is the largest part of an atom where the whole mass of an atom is contributed.

2. The fundamental particle not present in hydrogen is the neutron.

3. At 0 temperature in Kelvin the volume of gases ceases to zero.

4. Cathode rays consist of negatively charged particles having 0.000548591 a.m.u. mass is known as the electron.

5. Gases have low density because in gases intermolecular space is high.

6. Number of protons and neutrons in an atom is known as mass number.

7. Ammonia molecules have one lone pair of electron(s).