Quarks are the reason protons have a positive charge. Each quark has a fraction of an electric charge. A proton has two up ...

Number of protons Z = 30 Number of protons + neutrons A = 64 Number of neutrons N = 64 - 30 = 34 Since this is a nucleus there are no electrons There are 30 protons and 34 neutrons.

At the beginning of the century, it was believed by physicists that atoms were made up of protons and electrons. This view of the atomic nucleus changed when James Chadwick discovered the ...

T he atomic nucleus is made up of protons and neutrons, particles that exist through the interaction of quarks bonded by gluons. It would seem, therefore, that it should not be difficult to ...

The “lead” of a pencil is actually made of a substance called graphite which is made of carbon atoms. The picture shows a close-up of one carbon atom. A hydrogen atom has one proton as the nucleus and ...

This process takes place in the nucleus and occurs in a series of stages. The two strands of the DNA helix are unzipped by breaking of the weak Hydrogen bonds between base pairs. This unwinding of ...

then the RNA exits the nucleus to the cytoplasm, where it is used to make protein. In a single cell, around 1,000 RNAs, proteins and other molecules can be exchanged between the nucleus and the ...