A Helium atom has 2 protons in the center of its nucleus. Therefore its atomic number is 2. Its mass is greater than the mass of these 2 protons. Which of the following accounts for this difference in mass?
A neutrons
B molecules
C nuclei
D electrons

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.

What type of plant is good for a bioassay and where can i buy it? i only have a month.

Dna, in the nucleus carries the genetic code for making proteins in ribosomes. in the diagram, b, represents the proteins produced. dna cannot leave the nucleus to carry the genetic information to the ribosome where proteins are produced. how does the genetic code get from the nucleus to the ribosome? what does a represent? now