How many protons are in one kg of lead? b) how many electrons are in one kg of lead? c) what is the total negative charge of these electrons in coulombs?

Number of protons =

Number of electrons =

Charge on these electrons = -

Explanation:

1 atom of lead contains 82 protons and 82 electrons

1 mole = atoms

Thus,

1 mole of lead contains protons

Also, 1 mole of lead weighs 207.2 g

So,

207.2 g of lead contains protons

1 kg = 1000 g

So,

1000 g or 1 kg of lead contains protons

Number of protons =

Also, for neutral atom, number of protons = number of electrons.

Thus,

Number of electrons =

Also,

Charge of 1 electron = -

Charge on these electrons = -

Charge on these electrons = -

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

their crystal patterns have been disrupted by stress