1. An atom that loses or gains electrons is called a(n)____.

isotope
proton
neutron
ion***

2.Which subatomic particles are most involved in chemical bonding?
protons
electrons***
neutrons
isotopes

3.The main types of chemical bonds are___.
ionic, covalent, and metallic***
ionic,compound, and metallic
isotopic, covalent, and metallic
ionic, covalent, and nonmetallic

correct.

thank you!

1. An atom that loses or gains electrons is called an ion.

2. The subatomic particles most involved in chemical bonding are electrons.

3. The main types of chemical bonds are ionic, covalent, and metallic.

To get the answer to question 1, we can start by understanding the definition of the terms mentioned:

- An isotope is a variation of an element that has the same number of protons but a different number of neutrons in its nucleus.
- A proton is a subatomic particle with a positive charge found in the nucleus of an atom.
- A neutron is a subatomic particle with no charge found in the nucleus of an atom.
- An ion is an atom that has gained or lost electrons and therefore has a positive or negative charge.

Based on this knowledge, we can determine that the correct answer to question 1 is "ion" since it refers to an atom that has gained or lost electrons.

For question 2, we need to understand the concept of chemical bonding. Chemical bonding involves the sharing, transferring, or rearranging of electrons between atoms. The particles most directly involved in this process are electrons since they are responsible for the formation of chemical bonds. Therefore, the correct answer is "electrons".

Regarding question 3, there are different types of chemical bonds:
- Ionic bonds involve the transfer of electrons between atoms.
- Covalent bonds involve the sharing of electrons between atoms.
- Metallic bonds occur within metals and involve the free movement of electrons among atoms.

So, the correct answer to question 3 is "ionic, covalent, and metallic".