Question

Match these items.

1. Ca
electron
2. H 2O
fission
3. nuclear decay
atomic number
4. nuclear synthesis
neutron
5. η
proton
6. positive charge
fusion
7. e
element
8. number of protons in nucleus
compound

Answer 1

The list provides pairs of terms with their corresponding nuclear physics concepts, such as forms of matter, types of particles, and reactions.

Step-by-step explanation:

Here is a matching list for the given items using the provided information:

1. Ca - Element (from its placement on the periodic table, Ca is the symbol for Calcium)
2. H₂O - Compound (composed of Hydrogen and Oxygen)
3. Nuclear decay - This is a process and doesn't directly match the options provided, but it is related to the concept of a beta particle (B particle).
4. Nuclear synthesis - This typically involves fusion which is the combining of lighter nuclei to form heavier ones.
5. η - Neutron (it is the Greek letter 'eta' and is a common symbol for the neutron)
6. Positive charge - Proton (protons carry a positive charge)
7. e - Electron (the symbol 'e' represents an electron which carries a negative charge)
8. Number of protons in nucleus - Atomic number (the atomic number equates to the number of protons in an atom's nucleus)

Also, an alpha particle (a particle), involves a nucleus of a helium atom; a beta particle (B particle), is a high-speed electron; and a positron is a particle with the same mass as an electron but opposite charge. Gamma rays are a type of electromagnetic radiation. These all relate to concepts of nuclear decay and particles involved in nuclear reactions.