Question

2. Give experimental evidence to show that
(i) the entire mass of an atom is practically
concentrated in its nucleus, and
(ii) the nucleus of an atom is positively
charged.​

Answer 1

Answer:

1. Almost entire mass of an atom is concentrated in the nucleus. The nucleus of an atom contains both protons and neutrons and electrons revolves around it. The mass of an atom is contributed by protons and neutrons only and electrons are consider to have negligible mass.

2. Atoms are made up of a positively charged nucleus surrounded by a cloud of negatively charged electrons. ... The nucleus is a collection of particles called protons, which are positively charged, and neutrons, which are electrically neutral. Protons and neutrons are in turn made up of particles called quarks.

Please mark me as the Brainliest

Answer 2

Answer:

because the nucleus contain both proton ( positively charged particle) and neutron (neutral charge) , the positively charge particle is considered as the charge of nucleus